TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, cons

The Traffic Engineering Division has been conducting a study to determine the feasibility and applicability of traffic circles as a speed control device. Experi

This book presents a history of roundabouts, an introduction to their design, calculations of their capacity and traffic-safety features. It describes the key f