In 1920, state highway engineers, federal officials, and experts from academia were among a small group convened by the National Academy of Sciences to confront
TRB¿s National Cooperative Highway Research Program (NCHRP) Report 615: Evaluation of the Use and Effectiveness of Wildlife Crossings explores development of a
TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, cons