 Fatigue Loading and Design Methodology for High-Mast Lighting TowersMay 15, 2012 TRB’s National Cooperative Highway Research Program (NCHRP) Report 718: Fatigue Loading and Design Methodology for High-Mast Lighting Towers provides criteria for the fatigue design of high-mast lighting towers. The report also includes a series of proposed revisions with associated commentary to...
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 Travel Demand Forecasting: Parameters and TechniquesMay 1, 2012 TRB’s National Cooperative Highway Research Program (NCHRP) Report 716: Travel Demand Forecasting: Parameters and Techniques provides guidelines on travel demand forecasting procedures and their application for helping to solve common transportation problems. The report presents a range of approa...
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 Optimization of Tack Coat for HMA PlacementApril 12, 2012 TRB’s National Cooperative Highway Research Program (NCHRP) Report 712: Optimization of Tack Coat for HMA Placement presents proposed test methods for measuring the quality and performance characteristics of tack coat in the laboratory and the field, and includes a training manual presenting prop...
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 Guidelines on the Use of Auxiliary Through Lanes at Signalized IntersectionsJanuary 9, 2012 TRB’s National Cooperative Highway Research Program (NCHRP) Report 707: Guidelines on the Use of Auxiliary Through Lanes at Signalized Intersections provides guidelines to help in the justification, design, and analysis of auxiliary through lanes (ATLs) at signalized intersections. ATLs are lanes...
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 Evaluation of Safety Strategies at Signalized IntersectionsSeptember 19, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 705: Evaluation of Safety Strategies at Signalized Intersections explores crash modification factors (CMFs) for safety strategies at signalized intersections. CMFs are a tool for quickly estimating the impact of safety improvements.
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 A Performance-Related Specification for Hot-Mixed AsphaltDecember 6, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 704: A Performance-Related Specification for Hot-Mixed Asphalt provides a proposed performance-related specification (PRS) for hot-mix asphalt (HMA) in the form of the Microsoft Windows®-based Quality-Related Specification Softwar...
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 Guide for Pavement-Type SelectionOctober 14, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 703: Guide for Pavement-Type Selection includes processes for conducting systematic evaluations of pavement alternatives and for making decisions on pavement-type selection. The processes may be used for both agency-based and cont...
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 Proposed Specifications for LRFD Soil-Nailing Design and ConstructionOctober 31, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 701: Proposed Specifications for LRFD Soil-Nailing Design and Construction contains proposed specifications for the design and construction of soil-nailed retaining structures. The American Association of State Highway and Transpo...
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 A Comparison of AASHTO Bridge Load Rating MethodsSeptember 15, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 700: A Comparison of AASHTO Bridge Load Rating Methods documents an analysis of 1,500 bridges that represent various material types and configurations using AASHTOWare™ Virtis® to compare the load factor rating to load and resista...
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 Guidelines for the Use of Pavement Warranties on Highway Construction ProjectsJuly 20, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 699: Guidelines for the Use of Pavement Warranties on Highway Construction Projects is designed to help guide state departments of transportation (DOTs) in establishing pavement warranty programs. The guide identifies programmatic...
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 Performance of Corrugated Pipe Manufactured with Recycled Polyethylene ContentSeptember 5, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 696: Performance of Corrugated Pipe Manufactured with Recycled Polyethylene Content provides potential specifications for corrugated drainage pipe manufactured with recycled high-density polyethylene (HDPE). The report includes pr...
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 Evaluation and Performance Measurement of Congestion Pricing ProjectsJanuary 31, 2012 TRB’s National Cooperative Highway Research Program (NCHRP) Report 694: Evaluation and Performance Measurement of Congestion Pricing Projects is designed to help transportation agencies select or develop measures to evaluate congestion-pricing projects; collect the necessary data; track performan...
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 Mix Design Practices for Warm-Mix AsphaltMay 24, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 691: Mix Design Practices for Warm-Mix Asphalt explores a mix design method tailored to the unique material properties of warm mix asphalt technologies. Warm mix asphalt (WMA) refers to asphalt concrete mixtures that are produced ...
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 Costs of Alternative Revenue-Generation SystemsJune 13, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 689: Costs of Alternative Revenue-Generation Systems presents a framework for analysis of the direct costs incurred in generating the revenues that support federal-aid and state highway construction, operations, and maintenance an...
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 Determining Highway Maintenance CostsJune 20, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 688: Determining Highway Maintenance Costs presents a process for determining a highway agency’s full costs associated with performing highway maintenance. The process described in the report can be applied to any specific ma...
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 Guidelines for Ramp and Interchange SpacingApril 7, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 687: Guidelines for Ramp and Interchange Spacing explores guidelines for ramp and interchange spacing based on design, operations, safety, and signing considerations. The report is designed to help aid the decision-making process ...
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 Road Pricing: Public Perceptions and Program DevelopmentMarch 30, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 686: Road Pricing: Public Perceptions and Program Development explores road pricing concepts and their potential effectiveness and applicability. The report includes guidelines for project planning and integrating pricing into reg...
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 Strategies to Attract and Retain a Capable Transportation WorkforceApril 29, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 685: Strategies to Attract and Retain a Capable Transportation Workforce includes straight-forward, implementable practices that transportation Human Resources (HR) managers and hiring professionals can use to help improve the rec...
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 Enhancing Internal Trip Capture Estimation for Mixed-Use DevelopmentsMay 20, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 684: Enhancing Internal Trip Capture Estimation for Mixed-Use Developments explores an improved methodology to estimate how many internal trips will be generated in mixed-use developments—trips for which both the origin and destin...
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 Protocols for Collecting and Using Traffic Data in Bridge DesignMay 26, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 683: Protocols for Collecting and Using Traffic Data in Bridge Design explores a set of protocols and methodologies for using available recent truck traffic data to develop and calibrate vehicular loads for superstructure design, ...
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 Scour at Wide Piers and Long Skewed PiersFebruary 25, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 682: Scour at Wide Piers and Long Skewed Piers explores recommendations for a predictive equation for equilibrium local scour and a potential equation for predicting scour evolution rates at wide piers and skewed piers. The equati...
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 Development of a Precast Bent Cap System for Seismic RegionsFebruary 23, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 681: Development of a Precast Bent Cap System for Seismic Regions explores the development and validation of precast concrete bent cap systems for use throughout the nation’s seismic regions. The report also includes a series of r...
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 Manual for Emulsion-Based Chip Seals for Pavement PreservationApril 1, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 680: Manual for Emulsion-Based Chip Seals for Pavement Preservation examines factors affecting chip performance, highlights design and construction considerations, and explores procedures for selecting the appropriate chip seal ma...
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 Design of Concrete Structures Using High-Strength Steel ReinforcementApril 6, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 679: Design of Concrete Structures Using High-Strength Steel Reinforcement evaulates the existing American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design S...
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 Design of FRP Systems for Strengthening Concrete Girders in ShearMarch 3, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 678: Design of FRP Systems for Strengthening Concrete Girders in Shear offers suggested design guidelines for concrete girders strengthened in shear using externally bonded Fiber-Reinforced Polymer (FRP) systems. The guidelines ad...
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 Development of Levels of Service for the Interstate Highway SystemDecember 16, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 677: Development of Levels of Service for the Interstate Highway System examines a level-of-service-based approach to describing the performance of Interstate Highway System (IHS) assets. The report also includes a template and pr...
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 Intelligent Soil Compaction SystemsJanuary 15, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 676: Intelligent Soil Compaction Systems explores intelligent compaction, a new method of achieving and documenting compaction requirements. Intelligent compaction uses continuous compaction-roller vibration monitoring to assess m...
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 A Manual for Design of Hot-Mix Asphalt with CommentaryJune 2, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 673: A Manual for Design of Hot-Mix Asphalt with Commentary incorporates the many advances in materials characterization and hot-mix asphalt (HMA) mix design technology developed since the conclusion of the Strategic Highway Resea...
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 Roundabouts: An Informational Guide – Second EditionDecember 4, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide – Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-...
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 Recommended Procedures for Testing and Evaluating Detectable Warning SystemsOctober 28, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 670: Recommended Procedures for Testing and Evaluating Detectable Warning Systems explores a set of recommended test methods for evaluating the durability of detectable warning systems. These methods address exposure regimes, test...
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 Models for Predicting Reflection Cracking of Hot-Mix Asphalt OverlaysNovember 12, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 669: Models for Predicting Reflection Cracking of Hot-Mix Asphalt Overlays explores mechanistic-based models for predicting the extent and severity of reflection cracking in hot-mix asphalt overlays. Appendices A through T to NCHR...
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 Model Curriculum for Highway Safety Core CompetenciesNovember 30, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 667: Model Curriculum for Highway Safety Core Competencies presents course materials, including the instructor’s guide and student workbook, for a fundamental highway safety training course. The course is designed to address the c...
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 Measuring Transportation Network PerformanceOctober 4, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 664: Measuring Transportation Network Performance explores ways to monitor transportation network performance by developing new or integrating existing performance measures from different transportation modes and multiple jurisdic...
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 Design of Roadside Barrier Systems Placed on MSE Retaining WallsOctober 22, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 663: Design of Roadside Barrier Systems Placed on MSE Retaining Walls explores a design procedure for roadside barrier systems mounted on the edge of a mechanically stabilized earth (MSE) wall. The procedures were developed follow...
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 A Guidebook for Corridor-Based Statewide Transportation PlanningJuly 21, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 661: A Guidebook for Corridor-Based Statewide Transportation Planning explores a template for corridor planning designed to help states to better understand the implications of transportation decisions on mobility, communities, ec...
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 Transportation Performance Management: Insight from PractitionersJune 17, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 660: Transportation Performance Management: Insight from Practitioners explores the concept of performance management and examines how other agencies bring performance management into the decision-making process.
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 Guide for the Geometric Design of DrivewaysAugust 5, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 659: Guide for the Geometric Design of Driveways explores guidelines related to the geometric design of driveways. The report includes driveway-related terms and definitions, an examination of basic geometric controls, a summ...
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 Criteria for Restoration of Longitudinal BarriersMay 25, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 656: Criteria for Restoration of Longitudinal Barriers explores the identification of levels of damage and deterioration to longitudinal barriers that require repairs to restore operational performance.
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 Effects of Debris on Bridge Pier ScourJune 2, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 653: Effects of Debris on Bridge Pier Scour explores guidelines to help estimate the quantity of accumulated, flow event debris, based on the density and type of woody vegetation and river bank condition upstream and analytical pr...
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 Median Intersection Design for Rural High-Speed Divided HighwaysMay 14, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 650: Median Intersection Design for Rural High-Speed Divided Highways explores common safety issues at median intersections on rural divided highways, and examines innovative geometric and operational treatments for addressing tho...
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 Separation of Vehicles—CMV-Only LanesJuly 6, 2010 TRB's National Cooperative Highway Research Program (NCHRP) and National Cooperative Freight Research Program (NCFRP) have jointly released NCHRP Report 649/NCFRP Report 3: Separation of Vehicles—CMV-Only Lanes. The report examines major issues and concepts that should be understood in developing...
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 Mixing and Compaction Temperatures of Asphalt Binders in Hot-Mix AsphaltApril 26, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 648: Mixing and Compaction Temperatures of Asphalt Binders in Hot-Mix Asphalt explores enhanced test methods for determining laboratory mixing and compaction temperatures of modified and unmodified asphalt binders.
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 Human Factors Guidelines for Road Systems - Collection C: Chapters 16, 17, 18, 19, 20, 22 (Tutorials 4, 5, 6), 23 (Updated), 24, 25, 26 (Updated)July 28, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 600C, Human Factors Guidelines for Road Systems, Collection C--including Chapters 16, 17, 18, 19, 20, 22 (Tutorials 4, 5, 6), 23 (Updated), 24, 25, 26 (Updated)--explores human factors principles and findings for consideration by ...
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Calibration of Load Factors for LRFR Bridge EvaluationJuly 1, 2001 TRB's National Cooperative Highway Research Program (NCHRP) Report 454: Calibration of Load Factors for LRFR Bridge Evaluation contains the findings of a study to determine load factors for use in evaluating the load capacity of existing bridges. The report includes recommended values for load fa...
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Facilitating the Implementation of Research Findings: A Summary ReportJanuary 1, 1996 TRB’s National Cooperative Highway Research Program (NCHRP) Report 382: Facilitating the Implementation of Research Findings: A Summary Report explore the factors affecting implementation of research results, to delineate strategies that are expected to promote implementation, and to recommend re...
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 Calibration of LRFD Bridge Design CodeJune 15, 1999 TRB's National Cooperative Highway Reserach (NCHRP) Report 368: Calibration of LRFD Bridge Design Code explores the results of a study on the calculation of load and resistance factors for the AASHTO "LRFD Bridge Design Specifications" (1994).
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Travel Estimation Techniques for Urban PlanningJune 1, 1998 TRB’s National Cooperative Highway Research Program (NCHRP) Report 365: Travel Estimation Techniques for Urban Planning has released a report that reviews the four-step travel demand process and transferable parameters that can be used in simple planning analyses. In May 2012, TRB released NCHRP ...
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 Validating the Fatigue Endurance Limit for Hot Mix AsphaltApril 8, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 646: Validating the Fatigue Endurance Limit for Hot Mix Asphalt explores the existence of a fatigue endurance limit for hot mix asphalt (HMA) mixtures, the effect of HMA mixture characteristics on the endurance limit, and the pote...
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 Blast-Resistant Highway Bridges: Design and Detailing GuidelinesFebruary 26, 2010 TRB’s National Cooperative Highway Research Program (NCHRP) Report 645, Blast-Resistant Highway Bridges: Design and Detailing Guidelines explores code-ready language containing general design guidance and a simplified design procedure for blast-resistant reinforced concrete bridge columns. The re...
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 Implementing Transportation Knowledge NetworksDecember 21, 2009 TRB's National Cooperative Highway Research Program (NCHRP) Report 643: Implementing Transportation Knowledge Networks explores a business plan for the development of Transportation Knowledge Networks (TKNs) in the United States. The business plan defines ten key products and services to be provi...
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 Quantifying the Benefits of Context Sensitive SolutionsSeptember 22, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 642: Quantifying the Benefits of Context Sensitive Solutions explores guidelines for quantifying the benefits of applying the principles of Context Sensitive Solutions to transportation projects. Appendices A through E for NCHRP R...
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 Construction and Maintenance Practices for Permeable Friction CoursesOctober 16, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 640: Construction and Maintenance Practices for Permeable Friction Courses explores recommended practices for the design and construction of permeable friction courses (PFC) and examines PFC maintenance and rehabilitation. N...
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 Adhesive Anchors in Concrete Under Sustained Loading ConditionsAugust 12, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 639: Adhesive Anchors in Concrete Under Sustained Loading Conditions explores a test method designed to help determine an adhesive anchor’s ability to resist sustained tensile loads.
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 Guidelines for Guardrail ImplementationJune 10, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 638: Guidelines for Guardrail Implementation explores guidance on selecting the appropriate barrier performance level for the installation of longitudinal barriers. The following appendices to NCHRP Report 638 are only available ...
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 Guidelines for Dowel Alignment in Concrete PavementsJuly 2, 2009 TRB's National Cooperative Highway Research Program (NCHRP) Report 637: Guidelines for Dowel Alignment in Concrete Pavements examines the effects of dowel misalignment on concrete pavement performance, and highlights measures for reducing misalignment and its adverse effect. Appendixes A through...
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 Tools to Aid State DOTs in Responding to Workforce ChallengesJuly 7, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 636: Tools to Aid State DOTs in Responding to Workforce Challenges examines tools that officials of state departments of transportation (DOTs) can use in recruitment, development, and retention of a productive and effective workfo...
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 Acoustic Beamforming: Mapping Sources of Truck NoiseOctober 21, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 635: Acoustic Beamforming: Mapping Sources of Truck Noise explores the acoustic beamforming technique in an attempt to pinpoint and measure noise levels from heavy truck traffic. The beamforming technique uses an elliptical array ...
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 Texturing of Concrete PavementsNovember 9, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 634: Texturing of Concrete Pavements explores a recommended process for determining the type of concrete pavement texture that may be used for a specific highway project. The process considers the effects of texture type on fricti...
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 Impact of Shoulder Width and Median Width on SafetyJune 26, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 633: Impact of Shoulder Width and Median Width on Safety explores crash prediction models and accident modification factors for shoulder width and median width on rural four-lane roads.
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 An Asset-Management Framework for the Interstate Highway System April 24, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 632: An Asset-Management Framework for the Interstate Highway System explores a framework for applying asset-management principles and practices to managing Interstate Highway System investments.
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 Updated Test and Design Methods for Thermoplastic Drainage Pipe May 4, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 631: Updated Test and Design Methods for Thermoplastic Drainage Pipe explores a recommended load and resistance factor design (LRFD) specification for thermoplastic pipe used in culverts and drainage systems for highway structures.
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Measuring Tire-Pavement Noise at the SourceMarch 12, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 630: Measuring Tire-Pavement Noise at the Source examines a suggested procedure for measuring tire-pavement noise at the source using the on-board sound intensity (OBSI) method. The following appendixes to the report are availabl...
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 Self-Consolidating Concrete for Precast, Prestressed Concrete Bridge ElementsFebruary 16, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 628: Self-Consolidating Concrete for Precast, Prestressed Concrete Bridge Elements explores recommended guidelines for the use of self-consolidating concrete (SCC) in precast, prestressed concrete bridge elements. The report exam...
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 Traffic Safety Evaluation of Nighttime and Daytime Work ZonesDecember 10, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 627: Traffic Safety Evaluation of Nighttime and Daytime Work Zones explores the crash rates for nighttime and daytime work zones and examines management practices that promote safety and mobility in work zones. The re...
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 NDT Technology for Quality Assurance of HMA Pavement ConstructionJune 2, 2009 TRB's National Cooperative Highway Research Program (NCHRP) Report 626: NDT Technology for Quality Assurance of HMA Pavement Construction explores the application of nondestructive testing (NDT) technologies in the quality assurance of hot-mix asphalt (HMA) pavement construction. Supplement...
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 Procedures Guide for Right-of-Way Cost Estimation and Cost ManagementSeptember 12, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 625: Procedures Guide for Right-of-Way Cost Estimation and Cost Management explores approaches for developing right-of-way (ROW) cost estimates. The report also examines ways to track and manage ROW cost during all phases of proje...
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 Selection and Application of Warning Lights on Roadway Operations EquipmentDecember 1, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 624: Selection and Application of Warning Lights on Roadway Operations Equipment explores recommended guidelines for the selection and application of warning lights on roadway operations equipment. Appendixes A through E to...
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 Identifying and Quantifying Rates of State Motor Fuel Tax EvasionNovember 17, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 623: Identifying and Quantifying Rates of State Motor Fuel Tax Evasion explores a methodological approach to examine and reliably quantify state motor fuel tax evasion rates and support agency efforts to reduce differences betwee...
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 Effectiveness of Behavioral Highway Safety CountermeasuresNovember 21, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 622: Effectiveness of Behavioral Highway Safety Countermeasures explores a framework and guidance for estimating the costs and benefits of emerging, experimental, untried, or unproven behavioral highway safety countermeasures.
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 Modernize and Upgrade CANDE for Analysis and LRFD Design of Buried StructuresAugust 28, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 619: Modernize and Upgrade CANDE for Analysis and LRFD Design of Buried Structures explores the development, modernization, and upgrading of the CANDE (Culvert ANalysis and DEsign) program to a new program called CANDE-2007...
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 Accident Modification Factors for Traffic Engineering and ITS ImprovementsJuly 29, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 617: Accident Modification Factors for Traffic Engineering and ITS Improvements explores the development of accident modification factors (AMFs) for traffic engineering and intelligent transportation system improvements. AM...
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 Multimodal Level of Service Analysis for Urban StreetsSeptember 15, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 616: Multimodal Level of Service Analysis for Urban Streets explores a method for assessing how well an urban street serves the needs of all of its users. The method for evaluating the multimodal level of service (MMLOS) es...
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 Evaluation of the Use and Effectiveness of Wildlife CrossingsAugust 7, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 615: Evaluation of the Use and Effectiveness of Wildlife Crossings explores development of an interactive, web-based decision guide protocol for the selection, configuration, and location of wildlife crossings. The decision...
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 Refining the Simple Performance Tester for Use in Routine PracticeJune 30, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 614: Refining the Simple Performance Tester for Use in Routine Practice explores the develop of a practical, economical simple performance tester (SPT) for use in routine hot-mix asphalt (HMA) mix design and in the characte...
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 Safe and Aesthetic Design of Urban Roadside TreatmentsNovember 7, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 612: Safe and Aesthetic Design of Urban Roadside Treatments explores recommended design guidelines for safe and aesthetic roadside treatments in urban areas. The report also examines a toolbox of roadside treatments d...
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 Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and EmbankmentsFebruary 2, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 611: Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments explores analytical and design methods for the seismic design of retaining walls, buried structures, slopes, and embankments. T...
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 Communicating the Value of Transportation ResearchJune 24, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 610: Communicating the Value of Transportation Research explores integrating communications throughout the research process and introduces new ways to think about communicating the value of research. The report examines the...
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 GASB 34--Methods for Condition Assessment and PreservationMay 28, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 608: GASB 34—Methods for Condition Assessment and Preservation examines methodologies that integrate infrastructure inventory, condition assessments, minimum acceptable condition levels, and funding decisions with Governmental Ac...
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 Forecasting Statewide Freight ToolkitMarch 25, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 606: Forecasting Statewide Freight Toolkit explores an analytical framework for forecasting freight movements at the state level.
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 Passing Sight Distance CriteriaApril 18, 2008 TRB's National Cooperative Highway Research Program (NCHRP) Report 605: Passing Sight Distance Criteria explores current methods for determining minimum passing site distance (PSD) requirements and examines recommendations designed to bring consistency between PSD design standards and pavement m...
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 Human Factors Guidelines for Road Systems, Collection A: Chapters 1, 2, 3, 4, 5, 10, 11, 13, 22, 23, 26April 8, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 600A, Human Factors Guidelines for Road Systems, Collection A includes Chapters 1, 2, 3, 4, 5, 10, 11, 13, 22, 23, 26, which explore human factors principles and findings for consideration by highway designers and traffic e...
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 Human Factors Guidelines for Road SystemsApril 1, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 600: Human Factors Guidelines for Road Systems explores human factors principles and findings for consideration by highway designers and traffic engineers. The report is designed to help the nonexpert in human factors to consider...
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 Default Values for Highway Capacity and Level of Service AnalysesMay 8, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 599: Default Values for Highway Capacity and Level of Service Analyses examines the selection of default values when analyzing highway capacity and level of service. The report also explores how to prepare service vol...
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 Rotation Limits for Elastomeric BearingsMarch 15, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 596: Rotation Limits for Elastomeric Bearings explores the elastomeric bearing design procedures suitable for adoption in the American Association of State Highway and Transportation Officials' load and resistance factor de...
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 Countermeasures to Protect Bridge Piers from ScourDecember 28, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 593: Countermeasures to Protect Bridge Piers from Scour explores practical selection criteria for bridge-pier scour countermeasures; guidelines and specifications for the design and construction of those countermeasures; an...
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 Simplified Live Load Distribution Factor EquationsNovember 16, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 592: Simplified Live Load Distribution Factor Equations explores recommended Load and Resistance Factor Design (LRFD) live load distribution factor design equations for shear and moment that are simpler to apply and have a ...
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 Factors that Support the Planning-Programming LinkageNovember 19, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 591: Factors that Support the Planning-Programming Linkage explores the factors that influence the connection between planning and programming, and examines the steps that transportation agencies may take to strengthen the ...
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 Multi-Objective Optimization for Bridge Management SystemsOctober 24, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 590: Multi-Objective Optimization for Bridge Management Systems examines the development of methodologies for network- and project-level optimization of multiple, user-specified bridge management performance criteria. The r...
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 Improved Conditioning and Testing Procedures for HMA Moisture SusceptibilityNovember 28, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 589: Improved Conditioning and Testing Procedures for HMA Moisture Susceptibility explores whether combining the environmental conditioning system with the simple performance test would provide a superior procedure for dete...
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 Countermeasures to Protect Bridge Abutments from ScourSeptember 20, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 587: Countermeasures to Protect Bridge Abutments from Scour examines selection criteria and guidelines for the design and construction of countermeasures to protect bridge abutments and approach embankments from scour damag...
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 Rail Freight Solutions to Roadway Congestion--Final Report and GuidebookDecember 5, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 586: Rail Freight Solutions to Roadway Congestion—Final Report and Guidebook explores guidance on evaluating the potential feasibility, cost, and benefits of investing in rail freight solutions to alleviate highway co...
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 Full-Depth Precast Concrete Bridge Deck Panel SystemsFebruary 28, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 584: Full-Depth Precast Concrete Bridge Deck Panel Systems examines recommended guidelines and American Association of State Highway and Transportation Officials load and resistance factor design (LRFD) specifications...
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 Design of Construction Work Zones on High-Speed HighwaysMay 16, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 581: Design of Construction Work Zones on High-Speed Highways explores an approach for the selection of an appropriate construction work zone type; offers suggested guidance for the design of geometric features, including h...
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 Evaluating Air-Entraining Admixtures for Highway ConcreteJuly 30, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 578: Evaluating Air-Entraining Admixtures for Highway Concrete explores a procedure for evaluating air-entraining admixtures used in highway concrete. The procedure involves the testing of non-air-entrained concrete a...
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 TransXML: XML Schemas for Exchange of Transportation DataApril 2, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 576, TransXML: XML Schemas for Exchange of Transportation Data examines a proposed common framework for exchange of transportation data in eXtensible Markup Language, known as TransXML. The framework is designed to be used ...
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 Legal Truck Loads and AASHTO Legal Loads for PostingJuly 9, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 575: Legal Truck Loads and AASHTO Legal Loads for Posting explores recommended revisions to the legal loads for posting as depicted in the Manual for Condition Evaluation of Bridges, and the Guide Manual for Condition Evalu...
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 Superpave Mix Design: Verifying Gyration Levels in the Ndesign TableApril 23, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 573: Superpave Mix Design: Verifying Gyration Levels in the Ndesign Table examines the gyration levels in the Ndesign table (Table 1) of American Association of State Highway and Transportation Officials’ Standard Pra...
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 Roundabouts in the United StatesApril 5, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 572: Roundabouts in the United States explores methods of estimating the safety and operational impacts of roundabouts and examines updated design criteria for roundabouts. Also available are appendixes to the report, publi...
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 Standardized Procedures for Personal Travel SurveysMay 13, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 571: Standardized Procedures for Personal Travel Surveys explores the aspects of personal travel surveys that could be standardized with the goal of improving the quality, consistency, and accuracy of the resulting data.&nb...
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 Comparative Review and Analysis of State Transit Funding ProgramsDecember 20, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 569: Comparative Review and Analysis of State Transit Funding Programs examines the levels and types of state funding provided for public transportation. The report provides supplemental analyses of information collected in...
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 Riprap Design Criteria, Recommended Specifications, and Quality ControlNovember 28, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 568: Riprap Design Criteria, Recommended Specifications, and Quality Control examines design guidelines; recommended material specifications and test methods; recommended construction specifications; and construction, inspe...
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 Volumetric Requirements for Superpave Mix DesignDecember 7, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 567: Volumetric Requirements for Superpave Mix Design examines whether changes to the recommended Superpave mix design criteria for voids in mineral aggregate, voids filled with asphalt, and air voids content might further ...
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 Evaluation of Best Management Practices for Highway Runoff ControlJanuary 11, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 565: Evaluation of Best Management Practices for Highway Runoff Control examines best management practices for highway runoff control. These practices are designed to provide a means of avoiding or mitigating the negative impacts...
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 Field Inspection of In-Service FRP Bridge DecksJuly 27, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 564: Field Inspection of In-Service FRP Bridge Decks provides guidance for the in-service inspection of fiber-reinforced polymer (FRP) bridge decks. Part one of the report contains recommended field procedures, evalua...
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 Best-Value Procurement Methods for Highway Construction ProjectsOctober 23, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 561: Best-Value Procurement Methods for Highway Construction Projects examines procurement methods, award algorithms, and rating systems for use in awarding best-value highway construction contracts. The report also explores scre...
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 Guide to Contracting ITS ProjectsApril 26, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 560: Guide to Contracting ITS Projects provides guidance on the procurement of intelligent transportation systems (ITS), including variable message signs, traffic detectors, signal controllers, and a variety of other hardware and...
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 Communicating Changes in Horizontal AlignmentApril 24, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 559: Communicating Changes in Horizontal Alignment explores three recommended modifications to the Manual of Uniform Traffic Control Devices related to communicating changes in horizontal alignment for two-lane, two-way rur...
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 Aggregate Tests for Hot-Mix Asphalt Mixtures Used in PavementsOctober 5, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 557: Aggregate Tests for Hot-Mix Asphalt Mixtures Used in Pavements examines performance-based procedures to test aggregates for use in pavements utilizing hot-mix asphalt (HMA) mixtures and provides guidance on using these...
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 Test Methods for Characterizing Aggregate Shape, Texture, and AngularityJune 28, 2007 TRB’s National Cooperative Highway Research Program (NCHRP) Report 555: Test Methods for Characterizing Aggregate Shape, Texture, and Angularity examines a methodology for classifying aggregates based on the distribution of shape, texture, and angularity characteristics. The report a...
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 Aesthetic Concrete Barrier DesignFebruary 20, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 554: Aesthetic Concrete Barrier Design provides guidance for the aesthetic treatment of concrete safety shape barriers.
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 Crashworthy Work-Zone Traffic Control DevicesMarch 2, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 553: Crashworthy Work-Zone Traffic Control Devices examines nonproprietary, crashworthy work-zone traffic control devices that are constructed of readily available material.
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 Guidelines for Analysis of Investments in Bicycle FacilitiesApril 6, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 552: Guidelines for Analysis of Investments in Bicycle Facilities includes methodologies and tools to estimate the cost of various bicycle facilities and for evaluating their potential value and benefits. The report is desi...
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 Performance Measures and Targets for Transportation Asset ManagementApril 11, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 551: Performance Measures and Targets for Transportation Asset Management describes the research effort associated with production of the report and provides the current state of practice on the use of performance measures,...
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 Simplified Shear Design of Structural Concrete MembersJanuary 31, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 549: Simplified Shear Design of Structural Concrete Members examines development of practical equations for design of shear reinforcement in reinforced and prestressed concrete bridge girders. The report also includes recom...
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 Simple Performance Tests: Summary of Recommended Methods and DatabaseJune 29, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 547, Simple Performance Tests: Summary of Recommended Methods and Database examines the theory behind three simple performance tests for permanent deformation of hot-mix asphalt (HMA) and briefly describes the test methods. A set...
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 Incorporating Safety into Long-Range Transportation PlanningFebruary 22, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 546/CD ROM CRP-CD-62, examines where and how safety can be effectively addressed and integrated into long-range transportation planning at the state and metropolitan levels. The report includes guidance for practition...
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 Analytical Tools for Asset ManagementAugust 29, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 545: Analytical Tools for Asset Management examines two tools developed to support tradeoff analysis for transportation asset management. The software tools and the accompanying documentation are designed to help state department...
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 Environmentally Sensitive Channel- and Bank-Protection MeasuresNovember 28, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 544: Environmentally Sensitive Channel- and Bank-Protection Measures examines environmentally sensitive channel- and bank-protection measures and includes recommended design guidelines for their application and a selection system...
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 Effective Slab Width for Composite Steel Bridge MembersAugust 31, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 543: Effective Slab Width for Composite Steel Bridge Members examines recommended revisions to the American Association of State Highway and Transportation Officials’ specifications for the effective slab width of composite steel...
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 Evaluating Cultural Resource Significance: Implementation ToolsApril 28, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 542: Evaluating Cultural Resource Significance: Implementation Tools examines information technology (IT) tools that are designed to improve and streamline the National Register evaluation of cultural resources. The report ...
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 Consideration of Environmental Factors in Transportation Systems PlanningDecember 15, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 541: Consideration of Environmental Factors in Transportation Systems Planning examines processes, procedures, and methods for integrating environmental factors in transportation systems planning and decision making at the statew...
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 Aggregate Properties and the Performance of Superpave-Designed Hot-Mix AsphaltAugust 9, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 539: Aggregate Properties and the Performance of Superpave-Designed Hot-Mix Asphalt examines technical literature available since the conclusion of the Strategic Highway Research Program in 1993 on the impact of the aggregate pro...
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 Recommended Guidelines for Curb and Curb-Barrier InstallationsAugust 23, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 537: Recommended Guidelines for Curb and Curb–Barrier Installations presents the findings of a research project to develop guidelines for the use of curbs and curb–guardrail combinations on high-speed roadways. The report include...
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Handbook for Predicting Stream Meander Migration and Supporting SoftwareDecember 9, 2004 TRB's National Cooperative Highway Research Program (NCHRP) Report 533: Handbook for Predicting Stream Meander Migration describes the application of a stream prediction methodology and provides illustrated examples for applying the methodology. The handbook includes NCHRP CD-ROM 48 that c...
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 Effective Methods for Environmental Justice AssessmentSeptember 20, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 532: Effective Methods for Environmental Justice Assessment is designed to enhance understanding and to facilitate consideration and incorporation of environmental justice into all elements of the transportation planning process,...
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 Integral Steel Box-Beam Pier CapsNovember 3, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 527: Integral Steel Box-Beam Pier Caps examines details, design methodologies, and specifications for integral connections of steel superstructures to concrete intermediate piers. The report also includes an example illustrating ...
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 Snow and Ice Control: Guidelines for Materials and MethodsNovember 5, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 526: Snow and Ice Control: Guidelines for Materials and Methods provides guidance for selecting roadway snow and ice control strategies, and tactics for a wide range of winter maintenance operating conditions. This guidance appli...
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 A Guide to Emergency Response Planning at State Transportation AgenciesJanuary 13, 2011 TRB’s National Cooperative Highway Research Program (NCHRP) Report 525, Vol. 16: A Guide to Emergency Response Planning at State Transportation Agencies is designed to help executive management and emergency response planners at state transportation agencies as they and their local and regional c...
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 Security 101: A Physical Security Primer for Transportation AgenciesOctober 14, 2009 TRB’s National Cooperative Highway Research Program (NCHRP) Report 525, Vol. 14, Security 101: A Physical Security Primer for Transportation Agencies is designed to provide transportation managers and employees with an introductory-level reference document to enhance their working knowledge of se...
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 A Guide to Traffic Control of Rural Roads in an Agricultural EmergencyOctober 13, 2008 TRB’s National Cooperative Highway Research Program (NCHRP) Report 525, Vol. 13: A Guide to Traffic Control of Rural Roads in an Agricultural Emergency explores recommended practices and procedures associated with traffic control on local and state roads during agricultural emergencies.&nb...
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 A Guide to Transportation's Role in Public Health DisastersMay 26, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 525: Surface Transportation Security, Volume 10: A Guide to Transportation's Role in Public Health Disasters examines development of transportation response options to an extreme event involving chemical, biological, or rad...
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 System Security Awareness for Transportation EmployeesJune 13, 2006 TRB’s National Cooperative Highway Research Program (NCHRP) Report 525: Surface Transportation Security, Volume 7: System Security Awareness for Transportation Employees is a CD-based interactive multimedia training course designed to help transportation employees, supervisors, and manager...
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 Guide for Emergency Transportation OperationsSeptember 8, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 525: Surface Transportation Security, Volume 6: Guide for Emergency Transportation Operations supports development of a formal program for the improved management of traffic incidents, natural disasters, security events, and othe...
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 Guidance for Transportation Agencies on Managing Sensitive InformationJune 21, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 525: Surface Transportation Security, Volume 5: Guidance for Transportation Agencies on Managing Sensitive Information provides basic information on identifying and controlling access to sensitive information. NCHRP Report 525: S...
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 Incorporating Security into the Transportation Planning ProcessMay 24, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 525, Surface Transportation Security, Volume 3: Incorporating Security into the Transportation Planning Process examines the status, constraints, opportunities, and strategies for incorporating security into transportation planni...
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 Responding to Threats: A Field Personnel ManualDecember 6, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 525: Surface Transportation Security, Volume 1: Responding to Threats: A Field Personnel Manual includes a draft template that contains basic security awareness training in a workbook format that can be redesigned as a pamphlet, ...
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 Safety of U-Turns at Unsignalized Median OpeningsOctober 7, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 524: Safety of U-Turns at Unsignalized Median Openings includes recommended guidelines for locating and designing unsignalized median openings, and a methodology for comparing the relative safety performance of different designs.
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 Optimal Timing of Pavement Preventive Maintenance Treatment ApplicationsJanuary 28, 2005 TRB's National Cooperative Highway Research Program (NCHRP) Report 523: Optimal Timing of Pavement Preventive Maintenance Treatment Applications describes a methodology for determining the optimal timing for the application of preventive maintenance treatments to flexible and rigid pavements. NC...
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 A Review of DOT Compliance with GASB 34 RequirementsJuly 6, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 522: A Review of DOT Compliance with GASB 34 Requirements examines approaches taken by state departments of transportation to comply with the requirements of Governmental Accounting Standards Board (GASB) Statement No. 34. ...
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 Identification of Research Needs Related to Highway Runoff ManagementJanuary 12, 2005 TRB's National Cooperative Highway Research Program (NCHRP) Report 521: Identification of Research Needs Related to Highway Runoff Management summarizes significant stormwater management practices and research efforts, and it identifies the most pressing gaps and needs in the current state of kn...
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 Connection of Simple-Span Precast Concrete Girders for ContinuityJuly 14, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 519: Connection of Simple-Span Precast Concrete Girders for Continuity includes recommended details and specifications for the design of continuity connections for precast concrete girders. Also included in the report are e...
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 Safety Evaluation of Permanent Raised Pavement MarkersApril 30, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 518: Safety Evaluation of Permanent Raised Pavement Markers examines the safety performance of snowplowable permanent raised pavement markers on two-lane roadways and four-lane freeways.
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 Extending Span Ranges of Precast Prestressed Concrete GirdersApril 6, 2004 TRB's National Cooperative Highway Research Program (NCHRP) Report 517: Extending Span Ranges of Precast Prestressed Concrete Girders contains the findings of research performed to develop recommended load and resistance factor design procedures for achieving longer spans using precast prestresse...
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 Pier and Contraction Scour in Cohesive SoilsNovember 4, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 516: Pier and Contraction Scour in Cohesive Soils examines methods for predicting the extent of complex pier and contraction scour in cohesive soils.
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 Portable Scour Monitoring EquipmentApril 5, 2004 TRB's National Cooperative Highway Research Program (NCHRP) Report 515: Portable Scour Monitoring Equipment presents the findings of a research project undertaken to develop portable scour monitoring equipment for measuring streambed elevations at bridge foundations during flood conditions. The r...
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 Accelerated Pavement Testing: Data GuidelinesFebruary 24, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 512: Accelerated Pavement Testing: Data Guidelines is designed to assist agencies involved in accelerated pavement testing (APT) by ensuring proper interpretation of the data and facilitating their use by other agencies. Informati...
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 Guide for Customer-Driven Benchmarking of Maintenance ActivitiesApril 2, 2004 TRB's National Cooperative Highway Research Program (NCHRP) Report 511: Guide for Customer-Driven Benchmarking of Maintenance Activities provides guidance on how to evaluate and improve an agency's performance through a process called "customer-driven benchmarking." The objective of benchmarking ...
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 Equipment for Collecting Traffic Load DataMarch 16, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 509: Equipment for Collecting Traffic Load Data identifies the key issues that should be considered by state and other highway operating agencies in selecting traffic equipment for collecting the truck volumes and load spectra nee...
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 Load and Resistance Factor Design (LRFD) for Deep FoundationsAugust 30, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 507: Load and Resistance Factor Design (LRFD) for Deep Foundations examines resistance factors for driven pile and drilled shaft foundations,and provides a procedure for calibrating deep foundation resistance. Errata - Tabl...
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 Quality and Accuracy of Positional Data in TransportationJanuary 26, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 506: Quality and Accuracy of Positional Data in Transportation presents guidance for practitioners on the use of positional, or spatial, data in Geographic Information Systems for transportation applications. Supporting Software-G...
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 Review of Truck Characteristics as Factors in Roadway DesignJanuary 23, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 505: Review of Truck Characteristics as Factors in Roadway Design presents guidance to roadway geometric designers on how to accommodate large trucks on the U.S. highway system.
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 Design Speed, Operating Speed, and Posted Speed PracticesDecember 8, 2003 TRB’s National Cooperative Highway Research Program (NCHRP) Report 504: Design Speed, Operating Speed, and Posted Speed Practices examines the relationship between design speed and operating speed through a survey of the practice and an analysis of geometric, traffic, and speed conditions. The r...
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 Geometric Design Consistency on High-Speed Rural Two-Lane RoadwaysOctober 29, 2003 TRB’s National Cooperative Highway Research Program (NCHRP) Report 502: Geometric Design Consistency on High-Speed Rural Two-Lane Roadways presents rules on geometric design consistency suitable for use in an expert system such as the Interactive Highway Safety Design Model (IHSDM). The rules can...
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 Integrated Safety Management ProcessOctober 8, 2003 TRB’s National Cooperative Highway Research Program (NCHRP) Report 501 examines issues associated with developing an integrated safety management process, a tool to assist in integrating safety-related implementation actions by bringing together agencies within a jurisdiction that are responsible...
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 A Guide for Reducing Speeding-Related CrashesApril 8, 2009 TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 23: Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: A Guide for Reducing Speeding-Related Crashes provides suggested guidance on strategies that can be employed to reduce crashes involving speed...
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 A Guide for Addressing Collisions Involving MotorcyclesJanuary 24, 2009 TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 22: Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: A Guide for Addressing Collisions Involving Motorcycles provides guidance on strategies that can be employed to reduce crashes involving motor...
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 Safety Data and Analysis in Developing Emphasis Area PlansSeptember 4, 2008 TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 21: Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: Safety Data and Analysis in Developing Emphasis Area Plans provides guidance on data sources and analysis techniques that may be employed to a...
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 A Guide for Reducing Head-On Crashes on FreewaysJune 23, 2008 TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 20, Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: A Guide for Reducing Head-On Crashes on Freeways, provides strategies that can be employed to reduce head-on crashes on freeways. In 1998, the...
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 A Guide for Reducing Collisions Involving Young DriversDecember 19, 2007 TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 19, Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: A Guide for Reducing Collisions Involving Young Drivers provides strategies that can be employed to reduce collisions involving young drivers....
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 A Guide for Reducing Collisions Involving BicyclesApril 25, 2008 TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 18, Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: A Guide for Reducing Collisions Involving Bicycles provides strategies that can be employed to reduce collisions involving bicycles. In 1998, ...
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 A Guide for Reducing Work Zone CollisionsFebruary 15, 2006 TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 17, Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: A Guide for Reducing Work Zone Collisions provides strategies that can be employed to reduce work zone crashes. In 1998, the American Associat...
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 A Guide for Reducing Alcohol-Related CollisionsOctober 14, 2005 TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 16, Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: A Guide for Reducing Alcohol-Related Collisions provides strategies that can be employed to reduce crashes involving alcohol. In 1998, the Ame...
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 A Guide for Enhancing Rural Emergency Medical ServicesOctober 13, 2005 TRB’s National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 15, Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: A Guide for Enhancing Rural Emergency Medical Services provides strategies that can be employed to enhance rural emergency medical services. I...
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 A Guide for Reducing Crashes Involving Drowsy and Distracted DriversOctober 7, 2005 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan; Volume 14: A Guide for Reducing Crashes Involving Drowsy and Distracted Drivers provides strategies that can be employed to help reduce crashes invol...
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 A Guide for Reducing Collisions Involving Heavy TrucksJuly 16, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 500 Volume 13: Guidance for Implementation of the AASHTO Strategic Highway Safety Plan -- A Guide for Reducing Collisions Involving Heavy Trucks provides strategies that can be employed to reduce the number of collisions involvin...
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 A Guide for Reducing Collisions at Signalized IntersectionsAugust 18, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 500 Volume 12: Guidance for Implementation of the AASHTO Strategic Highway Safety Plan -- A Guide for Reducing Collisions at Signalized Intersections provides strategies that can be employed to reduce the number of collisions at ...
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 A Guide for Increasing Seatbelt UseJuly 7, 2004 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan; Volume 11: A Guide for Increasing Seatbelt Use provides strategies that can be employed to increase the use of seatbelts. Additional information on t...
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 A Guide for Reducing Collisions Involving PedestriansJuly 9, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 500: Guidance for Implementation of the AASHTO Strategic Highway Safety Plan Volume 10: A Guide for Reducing Collisions Involving Pedestrians provides strategies that can be employed to reduce the number of collisions involving p...
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 A Guide for Reducing Collisions Involving Older DriversJune 18, 2004 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan Volume 9: A Guide for Reducing Collisions Involving Older Drivers provides strategies that can be employed to reduce the number of collisions involvin...
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 A Guide for Reducing Collisions Involving Utility PolesJune 15, 2004 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan; Volume 8: A Guide for Reducing Collisions Involving Utility Poles provides strategies that can be employed to improve highway safety. Additional info...
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 A Guide for Reducing Collisions on Horizontal CurvesJune 10, 2004 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan Volume 7: A Guide for Reducing Collisions on Horizontal Curves provides strategies that can be employed to reduce the number of collisions on horizont...
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 A Guide for Addressing Run-Off-Road CollisionsAugust 28, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan Volume 6: A Guide for Addressing Run-Off-Road Collisions provides strategies that can be employed to reduce the number of run-off-road collisions. Add...
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A Guide for Addressing Unsignalized Intersection CollisionsJuly 18, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan Volume 5: A Guide for Addressing Unsignalized Intersection Collisions provides strategies that can be employed to reduce the number of unsignalized in...
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A Guide for Addressing Head-On CollisionsJuly 18, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan Volume 4: A Guide for Addressing Head-On Collisions provides strategies that can be employed to reduce the number of head-on crashes on two-lane roads...
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A Guide for Addressing Collisions with Trees in Hazardous LocationsJuly 18, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan Volume 3: A Guide for Addressing Collisions with Trees in Hazardous Locations provides strategies that can be employed to reduce the number of run-off...
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A Guide Addressing Aggressive-Driving CollisionsJune 25, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 500 -- Guidance for Implementation of the AASHTO Strategic Highway Safety Plan Volume 1: A Guide for Addressing Aggressive-Driving Collisions provides strategies that can be employed to reduce the number of crashes due to aggress...
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 Effects of Subsurface Drainage on Performance of Asphalt and Concrete PavementsJanuary 23, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 499: Effects of Subsurface Drainage on Performance of Asphalt and Concrete Pavements evaluates the effects of subsurface drainage features on the performance of pavements through a comprehensive analysis of data available through ...
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Illumination Guidelines for Nighttime Highway WorkJanuary 24, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 498: Illumination Guidelines for Nighttime Highway Work provides guidelines for illumination for nighttime highway work, work zone illumination design, and use of temporary roadway lighting for construction and maintenance work.
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 Financing and Improving Land Access to U.S. Intermodal Cargo HubsOctober 30, 2003 TRB’s National Cooperative Highway Research Program (NCHRP) Report 497: Financing and Improving Land Access to U.S. Intermodal Cargo Hubs offers guidance on strategies for financing improvements to cargo hub and intermodal freight facilities. These strategies focus on existing and emerging fundin...
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 Prestress Losses in Pretensioned High-Strength Concrete Bridge GirdersOctober 16, 2003 TRB’s National Cooperative Highway Research Program (NCHRP) Report 496: Prestress Losses in Pretensioned High-Strength Concrete Bridge Girders presents guidance to help bridge designers obtain realistic estimates of prestress losses in high-strength pretensioned concrete bridge girders to help ac...
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 Effect of Truck Weight on Bridge Network CostsJanuary 25, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 495: Effect of Truck Weight on Bridge Network Costs contains the findings of a study to develop a methodology for estimating the impact of changes in truck weight limits on bridge network costs. The report describes the research ...
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 Structural Supports for Highway Signs, Luminaires, and Traffic SignalsJune 26, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 494: Structural Supports for Highway Signs, Luminaires, and Traffic Signals provides recommendations for updating and refining AASHTO's Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Sign...
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 Roadside Safety Analysis Program--Engineer's ManualJune 17, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 492: Roadside Safety Analysis Program (RSAP)--Engineer's Manual describes the inner workings of the cost-effective analysis procedure and the various algorithms and data sources built into the roadside safety analysis procedure. A...
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 Crash Experience Warrant for Traffic SignalsOctober 17, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 491: Crash Experience Warrant for Traffic Signals describes a process for estimating the safety impacts of installing or removing traffic control signals and recommends an improved Crash Experience warrant for the Manual on Unifor...
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 In-Service Performance of Traffic BarriersJanuary 13, 2004 TRB's National Cooperative Highway Research Program (NCHRP) Report 490: In-Service Performance of Traffic Barriers presents the findings of a research project to develop a practical procedures manual for conducting in-service performance evaluations of roadside barriers. Appendix D
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 Design of Highway Bridges for Extreme EventsApril 10, 2003 TRB’s National Cooperative Highway Research Program (NCHRP) Report 489: Design of Highway Bridges for Extreme Events contains the findings of a study to develop a design procedure for application of extreme event loads and extreme event loading combinations to highway bridges. The report describ...
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 Additional Investigations on Driver Information OverloadApril 10, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 488: Additional Investigations on Driver Information Overload investigates the information load imposed on drivers from freeway signs and describes a model to predict driver information load. The model has been incorporated into ...
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 Using Customer Needs to Drive Transportation DecisionsMarch 27, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 487: Using Customer Needs to Drive Transportation Decisions presents guidelines on how to categorize customers into different market segments, how to identify and prioritize customer needs and service expectations, and how to use ...
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 Bridge Software--Validation Guidelines and ExamplesMay 28, 2003 The Transportation Research Board's National Cooperative Highway Research Program (NCHRP) Report 485: Bridge Software--Validation Guidelines and Examples describes "Process 12-50," a systematic method of comparing and evaluating bridge design and analysis software. Process 12-50 also provides a ...
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 Feasibility of All-White Pavement MarkingsJanuary 29, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 484: Feasibility Study for an All-White Pavement Marking System presents the findings of a research project to evaluate the feasibility of implementing an all-white pavement marking system in the United States; the findings includ...
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 Bridge Life-Cycle Cost AnalysisApril 10, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 483: Bridge Life-Cycle Cost Analysis contains a methodology for bridge life-cycle cost analysis (BLCCA), software that automates the methodology, and a guidance manual for carrying out BLCCA. Report Parts; Front Matter , Part I ,...
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 Guidelines for Selecting Compensatory Wetlands Mitigation OptionsJanuary 8, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 482: Guidelines for Selecting Compensatory Wetlands Mitigation Options offers guidance on selecting the most appropriate compensatory strategies to mitigate the effects of transportation projects on wetland habitats.
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 A Guide to Best Practices for Achieving Context-Sensitive SolutionsApril 24, 2003 TRB's National Cooperative Highway Research Program (NCHRP) Report 480: A Guide to Best Practices for Achieving Context-Sensitive Solutions focuses on how state departments of transportation and other transportation agencies can incorporate context-sensitive solutions into transportation project ...
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 Short-Term Monitoring for Compliance with Air Quality StandardsJune 21, 2004 TRB’s National Cooperative Highway Research Program (NCHRP) Report 479: Short-Term Monitoring for Compliance with Air Quality Standards provides transportation and air quality planners and decision makers with short-term monitoring procedures that can produce input data for predicting air qualit...
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Recommended Specifications for Large-Span CulvertsJanuary 5, 2002 TRB's National Cooperative Highway Research Program (NCHRP) Report 473: Recommended Specifications for Large-Span Culverts contains the findings of a study to develop recommended design and construction specifications for metal and concrete large-span culverts.
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 Traffic-Control Devices for Passive Railroad-Highway Grade CrossingsMay 21, 2002 TRB's National Cooperative Highway Research Program (NCHRP) Report 470: Traffic-Control Devices for Passive Railroad-Highway Grade Crossings evaluates traffic-control devices designed to improve the behavior of drivers approaching and crossing a passive railroad-highway grade crossing (i.e., one...
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 Fatigue-Resistant Design of Cantilevered Signal, Sign, and Light SupportsJune 26, 2002 TRB's National Cooperative Highway Research Program (NCHRP) Report 469: Fatigue-Resistant Design of Cantilevered Signal, Sign, and Light Supports includes guidance on design, installation, inspection, and maintenance of the cantilevered signal, sign, and light supports; and recommended specifica...
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 Performance Testing for Modular Bridge Joint SystemsJune 26, 2002 TRB's National Cooperative Highway Research Program (NCHRP) Report 467: Performance Testing for Modular Bridge Joint Systems presents recommended testing specifications; material, fabrication, and construction guidelines; and a joint anchorage design example for modular bridge joint systems.
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 Simple Performance Test for Superpave Mix DesignMay 21, 2002 TRB's National Cooperative Highway Reserach Program (NCHRP) Report 465: Simple Performance Test for Superpave Mix Design identifies a simple test for confirming key performance characteristics of Superpave volumetric mix designs.
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The Restricted Zone in the Superpave Aggregate Gradation SpecificationJanuary 1, 2001 TRB's National Cooperative Highway Research Program (NCHRP) Report 464: The Restricted Zone in the Superpave Aggregate Gradation Specification presents the findings of a research project to determine whether the restricted zone requirement is necessary for aggregate gradations designed in accord...
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 Recommended Performance-Related Specification for Hot-Mix Asphalt ConstructionJanuary 8, 2003 TRB's NCHRP Report 455, Recommended Performance-Related Specification for Hot-Mix Asphalt Construction: Results of the WesTrack Project, provides an overview of the WesTrack accelerated pavement testing experiment; a detailed description of its principal product, a performance-related specificati...
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 Guidelines for Warranty, Multi-Parameter, and Best Value ContractingJune 1, 2001 TRB's National Cooperative Highway Research Program (NCHRP) Report 451: Guidelines for Warranty, Multi-Parameter, and Best Value Contracting examines implementing selected nontraditional contracting methods for highway construction projects. The report includes guidelines for warranty, mul...
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Transportation Research Thesaurus and User's GuideJune 1, 2001 TRB's National Cooperative Highway Research Program (NCHRP) Report 450: Transportation Research Thesaurus and User's Guide that examines the Transportation Research Thesaurus and explores how the thesaurus should be used when developing index terms for a publication.
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 Elastomeric Bridge Bearings: Recommended Test MethodsJune 1, 2001 TRB's National Cooperative Highway Resarch Program (NCHRP) Report 449: Elastomeric Bridge Bearings: Recommended Test Methods examines performancerelated specifications for elastomeric bridge bearings. The report includes recommended specifications and three new test methods for evaluating essent...
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 Testing and Inspection Levels for Hot-Mix Asphaltic Concrete OverlaysJune 1, 2001 TRB's National Cooperative Highway Reserach Program (NCHRP) Report 447: Testing and Inspection Levels for Hot-Mix Asphaltic Concrete Overlays contains the findings of a study to develop a rational method for determining the minimum level for both agency and contractor testing and inspection acti...
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 Capacity and Operational Effects of Midblock Left-Turn LanesJune 1, 1997 TRB's National Cooperative Highway Research Program (NCHRP) Report 395: Capacity and Operational Effects of Midblock Left-Turn Lanes examines procedures for estimating the operational, safety, and access impacts of different midblock left-turn treatments and includes guidelines for selecting amo...
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Travel Estimation Techniques for Urban PlanningJune 1, 1998 This report updates NCHRP Report 187, Quick-Response Urban Travel Estimation Techniques and Transferable Parameters (1978). It provides a thorough review of the four-step travel demand process and transferable parameters that can be used in simple planning analyses. It will be particularly usefu...
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