HARRISBURG, PA — The Pennsylvania Department of Transportation (PennDOT) has announced compelling findings regarding the effectiveness of roundabouts in enhancing road safety. Recent data reveals that replacing traditional intersections with roundabouts has led to a 51 percent reduction in injury-related crashes and a 7 percent decrease in overall crashes over a 20-year review period.
PennDOT Secretary Mike Carroll emphasized the critical role of roundabouts, stating, “Roundabouts have proven to be an irreplaceable tool in reducing crashes at intersections.” This statement emphasizes the agency’s commitment to improving traffic flow and safety by considering roundabouts as a viable solution wherever feasible.
The study assessed 47 roundabouts on state routes, which were previously controlled by stop signs or signals, and had sufficient crash data pre- and post-construction. The analysis also identified eight new roundabouts included in this year’s review:
Adams County:
- Route 94 and Stoney Point Road.
Cumberland County:
- Route 1011 (Lambs Gap Road) and Bali Hai Road.
- Route 2017 (Lisburn Road) and Rossmoyne Road.
Lancaster County:
- Route 772 (Rothsville Road) and 6th Street Extension.
- Route 4022 (Woodcrest Avenue) and West 6th Street.
Mercer County:
- Route 62 and Shenango Valley Mall.
Philadelphia County:
- Route 2007 (Frankford Avenue), York Street and Trenton Avenue.
Washington County:
- Route 1009 (Morganza Road) and Baker Road.
Roundabouts not only improve safety but also enhance traffic efficiency and intersection aesthetics. While they are generally advantageous, they may not be suitable for all locations due to topographical constraints or property impacts. As PennDOT continues to explore intersection improvements, the success of roundabouts offers a compelling case for their broader adoption in future infrastructure projects.
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