Roadway Systems & Drivers

Review of Current Practices for Setting Posted Speed Limits

The aim of this study is to investigate the current practice of how speed limits are set across the country and to understand how the process impacts the traffic environment and drivers’ behaviors.

April 2019 // Research Brief PDF

Roadway Systems & Drivers

Safety Benefits of Highway Infrastructure Investments

This study estimates the reduction in serious injuries and deaths that could potentially be achieved through investment in proven cost-effective highway infrastructure safety measures, and the level of investment required to achieve those benefits.

May 2017 // Full Report PDF // Fact Sheet PDF

Roadway Systems & Drivers

Roadway Systems & Drivers

USRAP Pilot Program Phase III

This report details US Road Assessment Program pilot studies performed in Illinois, Kentucky, New Mexico, and Utah, and also presents the results of a validation study of the usRAP star rating protocol using data from Iowa and Washington.

May 2010 // Full Report PDF

Roadway Systems & Drivers

Roadway Systems & Drivers

USRAP Pilot Program Phase II

Development of specialized risk maps that address safety issues of interest to the participating states, such as unbelted occupant, speed-related, alcohol-involved, roadway- and lane-departure, commercial-vehicle-involved, older driver, and young driver crashes.

January 2008 // Full Report PDF