Zieglerville Roundabout Part of PennDOT Safety Study

HARRISBURG PA – A study of 26 roundabouts (at top) used by motor vehicle traffic in Pennsylvania – including the one on Route 29 in Zieglerville, and three in southern Chester County – shows fatalities, injuries, and crashes have decreased overall in the time since they were built, according to Pennsylvania Department of Transportation data released Wednesday.

While acknowledging roundabouts are “not the right option for every intersection,” department Secretary Yassmin Gramian added that when installed, state statistics show roundabouts save lives and reduce crash severity … The modern roundabout is simply safer than the traditional intersection,” she said.

PennDOT recently reviewed the roundabouts, selected for availability of earlier crash information, on state routes at intersections that were previously stop- or signal-controlled. Department data based on police-submitted crash reports over two decades (2000-2020) shows fatalities at those locations were reduced by 100 percent, and the total number of crashes decreased by 22 percent.

Additionally, suspected serious injuries were reduced by 81 percent; suspected minor injuries were reduced by 36 percent; possible or unknown severity injuries were reduced by 76 percent; and property damage-only crashes increased by 13 percent.

Roundabouts are frequently installed to address intersections with safety issues. They also may be installed to improve traffic flow, or for traffic calming, and to facilitate pedestrian mobility. They are recognized as an innovation that has become standard practice within the transportation community, the department noted.

Photo and video provided by the Pennsylvania Department of Transportation