Roundabout are efficient and an extremely cost effective transportation intersection improvement. Of course, they aren't a one-size-fits-all solution, but they do help solve challenging intersection and road design problems. They also move traffic extremely well. That being said, it often takes time for the public to warm up to them. No doubt you've been attended a public meeting and have heard from the naysayers. So, in an effort to help you sell the concept, we've put together the following infographic based on facts from the Washington State Department of Transportation and the US Department of Transportation.

1. Why
Roundabouts?
Yes. They’re worth the dizziness!
Studies show that roundabouts are safer and
more efficient than stop sign or signal-controlled
intersections
Reduction in
fatal collisions!
Reduction in Collisions
Graph shows reductions in collisions when traditional
intersection controls are replaced by a roundabout
Source: WSDOT Roundabout Benefits
Why else do we love them?
Reduces Delay
Roundabouts reduce delays by as much as 89%. Total
vehicle stops are reduced by 56%.
LowerCost
Although initial construction costs may be comparable, the
long-term maintenance and operation costs of a
roundabout are significantly cheaper.
Smaller Footprint
Although the footprint of a roundabout may be larger than
a typical intersection, the total area needed for the
approaches to the intersection are reduced because traffic
moves through the intersection more smoothly.
Where Should They Be Located?
High crash rate locations
Intersections with traffic delays
Complex intersection geometry
Frequent left-turn movements
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Sources:
Washington State Department of Transportation
US Department of Transportation