Public Works


A roundabout is a circular intersection in which traffic flows counterclockwise around a center island. There are no traffic signals or stop signs in a roundabout. According to the U.S. Department of Transportation, roundabouts improve safety, reduce congestion, reduce pollution, save money, and are functional. When compared to other intersections, roundabouts result in a 90% reduction in fatalities, 76% reduction in all injuries, and a 35% reduction in crashes.

In addition to keeping drivers safe, roundabouts are easy to maneuver and reduce congestion. Drivers only have to watch for traffic from the left, and can enter the roundabout when there is adequate space available. Once in the roundabout, drivers have the right-of-way, so they will not have to stop or yield to exit. Any delay that could take place in a roundabout is shorter than the amount of time spent waiting at a traffic light.

 There are just a few guidelines to remember when driving through a roundabout:

  • Slow down.
  • If there's more than one lane, use the left lane to turn left, the right lane to turn right, and all lanes to go through, unless directed otherwise by signs and pavement markings.
  • Yield at the entry to circulating traffic.
  • Stay in your lane within the roundabout and use your right-turn signal to indicate your intention to exit.
  • Always assume trucks need all available space — don't pass them!
  • Clear the roundabout to allow emergency vehicles to pass.


The City of Blue Ash Public Works Department has created several educational videos about roundabout safety:

Learn about the history of roundabouts, why they are safer, and why they are becoming more popular from CNBC. 

Easy-to-understand videos and graphics about roundabouts have also been created by the City of Hilliard, Ohio, and the Ohio Department of Transportation. Click the link below for this valuable information:
Roundabout video resources and information 

More information about roundabouts and safety:
City of Blue Ash Roundabout FAQ
Driving Tips
Ohio Department of Transportation
Ohio Department of Transportation Roundabout Rules
Federal Highway Administration
Indianapolis Department of Public Safety
Federal Highway Administration
Navigating a Multi-Lane Roundabout by Minnesota LRRB
Roundabouts are Better