The National Highway Traffic Safety Administration's (NHTSA's) Office of Program Development and Evaluation (OPDE) conducts research and evaluation projects dealing with human attitudes, behaviors, and failures (motor vehicle crashes). This compendium is an annotated bibliography of 10-year's worth of behavioral research sponsored by NHTSA and conducted by OPDE. It provides a brief description of nearly two hundred OPDE projects past, present, and on-going. The compendium also includes information on how individual reports can be obtained.

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-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.