Roundabouts

A roundabout is...

A type of small, circular intersection that is designed such that traffic travels counter-clockwise around a central island at speeds of approximately 15-20 miles per hour.

Roundabouts are significantly safer...

Than traditional forms of intersection control. According to studies performed by the Insurance Institute for Highway Safety at single-lane roundabouts, fatalities are reduced by 90%, injuries by 70%, and all crashes by 40%.

Vehicles entering a roundabout...

Are regulated with a yield sign. Entering traffic yields to vehicles already in the roundabout.  When there is a sufficient gap in the traffic within the circle, yielding vehicles may enter.

Additional Information

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  • How to Drive a Roundabout - Video
  • How to Drive a Roundabout
  • Roundabout Brochure
    What is a roundabout? A roundabout is a one-way, circular intersection without traffic signal equipment in which traffic flows around a center island. All roundabouts have these features: Yield-at-entry · Traffic entering the circle yields to t...
  • Roundabout Signage and Pavement Markings
    There are several signs and pavement markings that are used extensively at roundabouts. Here are their meanings: Signs Roundabout Ahead: This sign is posted in advance of the roundabout to alert drivers that they are approaching a roundabout. Undern...
  • Roundabout Presentation (May 20, 2009)
    Panelists West Lafayette Roundabout Community Forum · Jeromy Grenard, PE ­ American Structurepoint · Mike McBride, PE ­ City Engineer, City of Carmel, Indiana · Craig Parks, PE ­ American Structurepoint May 20, 2009 Rou...
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