PennDOT shares data on Pennsylvania roundabouts

Photo from Google Maps The roundabout at the intersection of Rt. 19 and Rt. 97 in Waterford, Erie County, was one of 11 across the state included in a survey of the data conducted by PennDOT that concluded fatalities, injuries and the total number of crashes are decreased from when those intersections were signalized.

PennDOT released data on Thursday for 11 roundabouts recently constructed throughout the state that shows decreases in fatalities, injuries and the total number of crashes.

A statement from PennDOT said that the roundabouts are all located on state routes that were previously either controlled by stop signs or traffic lights.

“These roundabouts were reviewed based on having at least three years of data available before and after the roundabout’s installation,” PennDOT explained, noting that the 11 reviewed are all that meet that criteria stemming from police-submitted crash reports between 2000 and 2017.

Here’s what PennDOT says the data shows: Fatalities reduced by 100 percent from two to zero; serious injuries were reduced by 100 percent from seven to zero; minor injuries were reduced by 95 percent from 19 to 1; possible/unknown severity injuries were reduced by 92 percent from 49 to four; crashes causing only property damages decreased by two percent from 49 to 48 and the total number of crashes dropped by 47 percent from 101 to 54.

PennDOT said that in addition to the 11 roundabouts that met the criteria, an additional 32 have been installed on state roads and 26 are in design.

The roundabout in Waterford at the intersection of Rt. 19 and Rt. 97 was included in the data, PennDOT said.

“Roundabouts are frequently installed to address intersections with safety issues, but may also be installed to improve traffic flow as well as other reasons, such as property impacts, capacity issues and proximity to other intersections,” PennDOT said. “Although roundabouts are safer and typically more efficient than traditional signalized intersections, in many cases they may not be the best option due to topography or other reasons, such as property impacts, capacity issues and proximity to other intersections.”

“Our data shows that modern-day roundabouts reduce crash severity and injuries while improving traffic flow,” PennDOT Secretary Leslie Richards said. “This underscores why roundabouts are becoming more commonplace in Pennsylvania.”

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