Arterial Operations Roundabout

Roundabout Strategy Summary

Table of Contents

  • Introduction
  • Components of Roundabouts
  • Caveat in Accessibility
  • Bicycle Travel
  • Resources for Implementation
  • Summary
  • CMAP Role


Modern roundabouts are a safer, more efficient design option that can often be used in place of traffic signals or stop signs. Early studies of U.S. roundabouts showed that small roundabouts have lower injury and total crash rates than conventional intersections. This short paper gives an introduction to roundabouts, explains their components, and provides resources for design and implementation.

If you're interested in learning more about roundabouts, please review the following CMAP strategy report (PDF). Comments and criticism are encouraged.