CTDOT Celebrates National Roundabouts Week

During National Roundabouts Week, the Connecticut Department of Transportation (CTDOT) is highlighting the critical role modern roundabouts play in enhancing roadway safety.

Circular in shape, a modern roundabout is a type of intersection that moves traffic one way in a counterclockwise direction around a center island. Its channelized approaches force vehicles to slow down and yield to crossing pedestrians or bicyclists and traffic already in the circle.

Rules of the roundabout:

• Slow down. Going slower provides more time to make decisions and be better prepared to yield to other road users. It also helps reduce the likelihood and severity of crashes.
• Look around. When approaching the roundabout, look for signs and markings about speed and lane choice.
• Be ready to yield. Drivers entering the roundabout must yield to traffic in all lanes of the roundabout, not just in the lane closest to them. Bicyclists should enter the roundabout with vehicles or dismount to use sidewalks and crosswalks.

The modern roundabout configuration results in a roughly 80% reduction in fatal and serious injuries at formerly signalized and two-way stop-controlled intersections, according to the Federal Highway Administration. Here in Connecticut, a study of five roundabouts found an 81% reduction in severe crashes and a 44% reduction in total crashes.

"The conversion of signalized and stop-controlled intersections to modern roundabouts has been shown to significantly reduce both the number and impact of crashes. We strongly support building roundabouts where appropriate to help keep people moving safely and efficiently," said Connecticut Department of Transportation Commissioner Garrett Eucalitto. "If your city or town is considering a roundabout project, we encourage you to reach out. We have a team that stands ready to help."

As a recognized Safe System solution, more than 10,000 roundabouts have been installed in cities and towns across the U.S. There are currently more than 30 roundabouts on state and local roads in Connecticut, with more than a dozen planned or under construction.

In Monroe, a roundabout at Route 110 and Route 111 opened in 2018. The project was designed to improve safety at the intersection.

"The crashes have been reduced in both frequency and severity," said Monroe Police Chief Keith White. "The roundabout was a successful venture for the state and beneficial for the town of Monroe."

The CTDOT Roundabout Committee is comprised of experienced engineers who assist with the planning, designing, and constructing of roundabouts around the state - serving as a resource for Connecticut cities and towns. The Committee reviews roundabout concepts, advises on good design practices, and can help answer questions on size, suitability, materials, pavement markings, and more.

For more information and resources on Connecticut roundabouts, visit ct.gov/dot.