Roundabout FAQs

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Are roundabouts safer than traditional signalized intersections?

Each intersection needs to be evaluated based on a complex set of factors and public input to determine what is appropriate, and whether a roundabout would be safer.
Studies have shown that roundabouts reduce the number and severity of accidents compared to traditional stop signs or signalized intersections. Roundabouts are designed to help slow vehicle speeds, which in turn helps to reduce severe and fatal crashes. Roundabouts generally reduce crashes by approximately 35% for all crashes and 76% for injury crashes, when converted from a signalized intersection or intersection with stop signs. Single-lane roundabouts generally offer greater safety than multilane roundabouts due to fewer points of conﬂict. [Source: NCHRP 672]

Do roundabouts reduce congestion?

Each intersection needs to be evaluated based on a complex set of factors and public input to determine what is appropriate, and whether a roundabout would reduce congestion.
According to the Wisconsin Department of Transportation (WisDOT), a study measuring traffic flow at intersections before and after conversion to roundabouts in Nevada, Kansas and Maryland found that traffic delays were reduced between 13 to 23 percent.
The West Lisbon Avenue analysis indicates the time to drive along the corridor would be similar to today, with some times of the day being slightly longer and some times of the day slightly shorter.

How do pedestrians and cyclists navigate roundabouts?

The roundabouts will have separate crosswalks and paths for pedestrians and bicyclists. Pedestrians should use the marked crosswalks, while cyclists can use the newly constructed bike lanes and bike crossings. Median refuges will be included so pedestrians and bicyclists can cross one side of the street, wait in the median if needed, and then cross to the other side of the street

How do emergency vehicles navigate roundabouts?

The roundabouts are designed for emergency vehicles. Emergency vehicle drivers are trained to navigate roundabouts safely. Motorists should yield to emergency vehicles entering the roundabouts and pull over to allow them to pass. Add an answer to this item.

How are roundabouts designed to accommodate large vehicles?

Roundabouts are designed with larger vehicles in mind, providing mountable aprons to accommodate the turning radius of trucks.