The Pennsylvania Department of Transportation is outlining the differences between roundabouts and traditional traffic circles, including how vehicles enter, travel through and exit each type of intersection.
In a roundabout, drivers entering the intersection slow down or yield to traffic already circulating. Traffic inside the roundabout does not stop, which allows a higher volume of vehicles to continue moving through the intersection.
Roundabouts are also designed to keep vehicle speeds below 30 mph. In multi-lane roundabouts, drivers should not change lanes while circulating except when exiting.
Traffic circles operate differently. According to PennDOT, entry is often controlled by a traffic signal or stop sign, and vehicles already circulating may be required to stop for entering traffic.
Vehicles may also enter traffic circles at higher speeds, and lane changes are permitted. PennDOT said the combination of higher speeds and lane changes can contribute to crashes.
Additional information about roundabouts is available at PennDOT’s roundabout webpage. The department also provides a video explaining how motorists, bicyclists and pedestrians should navigate single- and multi-lane roundabouts.
Photo credits to Pennsylvania Department of Transportation (PennDOT)
