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Measuring the Characteristics of Pavement Surface Images
5/17/2024 2:00:41 PM
Imaging systems are commonly used for conducting pavement evaluations. The American Association of State Highway and Transportation Officials' Standard Practice for Collecting Images of Pavement Surfaces for Distress Detection addresses the collection of images. However, there are no widely accepted methods for measuring the characteristics of pavement surface images such as 2-dimensional optical images and 3-dimensional surface elevation images. NCHRP Research Report 1106: Measuring the Characteristics ...
Business Intelligence Techniques for Transportation Agency Decision-Making
5/17/2024 2:00:16 PM
Strategic approaches to the management and operation of transportation systems blend knowledge of agency goals, asset conditions, traffic and safety performance, and finance and budget constraints. This knowledge is based on data, and many agencies are implementing consolidated data governance practices to improve data quality, maximize the value of the data to the agency, and better manage data collection and analysis resources. NCHRP Research Report 1099: Business Intelligence Techniques for Transporta...
Post-Construction Evaluation Practices for Highway Projects Delivered Using Alternative Contracting Methods
5/16/2024 3:00:39 PM
Alternative contracting methods (ACMs) capture the delivery methods that are not design-bid-build (D-B-B), low bid, or traditional federal aid. Common ACMs used by state departments of transportation (DOTs) include design-build (D-B), construction manager/general contractor (CM/GC), progressive design-build (P-D-B), public-private partnerships (P3), and indefinite delivery/indefinite quantity (IDIQ), which is also called job order contracting. NCHRP Synthesis 622: Post-Construction Evaluation Practices f...
Guide for Response Planning, Assessment, and Rapid Restoration of Service of Bridges in Extreme Events
5/16/2024 3:00:28 PM
Extreme events resulting from natural or other disasters, such as fires, floods, earthquakes, tornados, and hurricanes, can damage bridge structures in ways that impact the safety of motorists and the public. The procedures currently employed for response planning, assessment, and rapid restoration of service of these structures to maintain safety do not always address the full range of needs for personnel, communication, coordination, data collection, assessment levels, and other factors associated with...
Response Planning, Assessment, and Rapid Restoration of Service of Bridges in Extreme Events: Background and Summary
5/16/2024 3:00:20 PM
Extreme events, such as hurricanes, tornados, floods, earthquakes, fires, and collisions, pose a threat to the transportation infrastructure that millions of people depend on daily. NCHRP Web-Only Document 390: Response Planning, Assessment, and Rapid Restoration of Service of Bridges in Extreme Events: Background and Summary , from TRB's National Cooperative Highway Research Program, supplements the information and guidance on all aspects of response planning, assessment, and rapid restoration of ...
Operational Performance and Safety Effects of Arterial Weaving Sections
5/16/2024 3:00:05 PM
As drivers place increasing demands on transportation infrastructure and freeway congestion continues to increase, arterials have become an alternative route for many drivers, resulting in the lower performance of these roadways. In many areas, weaving maneuvers – defined as the crossing of two or more traffic streams in the same direction between two or more access points on a multilane urban street with some type of traffic control – negatively affect arterial operations and safety. NCHRP Research Repo...
Practices for Capturing and Integrating Cost Data in Maintenance Management Systems
5/10/2024 4:00:17 PM
State departments of transportation (DOTs) face considerable challenges in implementing, enhancing, or replacing their existing maintenance management systems (MMSs). These processes are not only expensive and time-consuming but also involve considerable risk, because these systems have usually been in place for many years. NCHRP Synthesis 629: Practices for Capturing and Integrating Cost Data in Maintenance Management Systems , from TRB's National Cooperative Highway Research Program, documents current ...
Recycling Waste Plastics in Asphalt Pavements
5/10/2024 12:00:20 PM
The increasing volume of plastic waste generated each year is a global problem—one that has been magnified following the 2017 passing of China’s Operation National Sword policy that ended the import of waste plastics into the country effective January 2018. Rightfully, this action has awakened a renewed effort to reduce and recycle plastic waste and asphalt pavements have been identified as a potential new end-market opportunity. TR Circular E-C291: Recycling Waste Plastics in Asphalt Pavements , from th...
State DOT Product Evaluation Processes
5/9/2024 1:00:57 PM
The construction, maintenance, and operation of transportation infrastructure requires immense amounts of products and materials. New products, materials, engineered systems, and innovative technologies are presented to state departments of transportation (DOTs) by suppliers and manufacturers, as well as sometimes by contractors and internal DOT staff. NCHRP Synthesis 616: State DOT Product Evaluation Processes , from TRB's National Cooperative Highway Research Program, documents current state DOT practi...
Automated Data Feature Extraction from Bridge Plans
5/1/2024 8:00:48 PM
In bridge engineering, machine learning (ML) and artificial intelligence (AI) have been employed to enhance the efficiency of the structural design phase, aid in the selection of optimal bridge types, produce cost estimates, conduct realtime structural health monitoring, predict structural response and deterioration, reconstruct data for comprehensive health assessment, and prioritize maintenance efforts. The TRB IDEA (Innovations Deserving Exploratory Analysis) Program's NCHRP IDEA Final Report for Proj...
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