Roundabouts have seen unprecedented growth across the United States, from just a handful a decade ago to more than 2,000 and counting. National guidance had to keep pace with the needs of states and communities planning and implementing roundabouts, and NCHRP took a lead role.

In regions across the nation, bridge engineers know that the next major seismic event is coming—maybe tomorrow, maybe centuries from now. DOTs have the critical charge of designing for earthquakes and protecting the lives of travelers.

The Committee on National Statistics, part of the National Academies’ Division on Behavioral and Social Sciences and Education (DBASSE) has released a report that examines several aspects of census planning, including questionnaire design, address updating, non-response follow-up, coverage follow-up, de-duplication of housing units and residents, editing and imputation procedures, and several o...

A featured article in the January-February 2010 TR News explores the mutually beneficial relationship between public transit via streetcars and professional baseball that began in the late 1800s.