TRB's National Cooperative Highway Research Program ( NCHRP) Web-Only Document 228 : Safety Impacts of Intersection Sight Distance documents the methodology and presents the results from NCHRP Research Report 875 : Guidance for Evaluating the Safety Impacts of Intersection Sight Distance. It provides  the underlying research on estimating the safety effects of intersection sight distance (ISD)  at stop-controlled intersections. To establish the relationship between ISD and safety at stop-contro...

TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 249: Combining Individual Scour Components to Determine Total Scour explores the relationships among individual scour components observed in the same flow event at a bridge. The report provides insight into ways to combine scour components to produce realistic estimates of total scour depth for safe and economical design of bridge foundations. The scour components of interest are lateral contraction scour, abutment scour, verti...

TRB’s National Cooperative Freight Research Program (NCFRP) Web-Only Document 5: Carbon Footprint of Supply Chains: A Scoping Study defines a standardized, conceptual approach to assessing global greenhouse gas (GHG) emissions of the transportation component of supply chains, critiques current methods and data used to quantify greenhouse gas (GHG) emissions, and outlines a work plan to develop a decision tool to help estimate the carbon footprint of the transportation component of supply chains.

TRB’s National Cooperative Freight Research Program (NCFRP) Web-Only Document 4: Identification and Evaluation of Freight Demand Factors focuses on the identification of independent variables that may be used to explain gross measures of freight demand over time.

TRB’s National Cooperative Freight Research Program (NCFRP) and National Cooperative Highway Research Program (NCHRP) have jointly released NCFRP Web-Only Document 3/NCHRP Web-Only Document 185: Truck Tolling: Understanding Industry Tradeoffs When Using or Avoiding Toll Facilities. The report explores the value that shippers, trucking companies, and truck drivers seek from toll roads.

TRB’s National Cooperative Freight Research Program (NCFRP) Web-Only Document 1: Web-Only Document 1: Background Research Material for Freight Facility Location Selection: A Guide for Public Officials (NCFRP Report 13) provides background material used in the development of NCFRP Report 13 , which describes the key criteria that the private sector considers when making decisions on where to build new logistics facilities.

TRB’s National Cooperative Freight Research Program (NCFRP) Web-Only Document 2: Multi-State Freight Transportation Organizations examines approaches to establishing multi-state freight transportation organizations that can develop and implement long-term investment plans. The report has a special focus on the legal and financial requirements as well as the composition, structure, and decision-making facets of the organizations.