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Roundabouts again shown to improve safety

September 3, 2020

PennDOT released a report this week that once again verifies that roundabouts are considerably safer than the intersections they replace.

PennDOT examined data gathered at 22 roundabouts on state routes at intersections that previously had been controlled with traffic signals or stop signs. All 22 had at least three years of crash data available before and after the roundabout was built.

The data showed that suspected serious injuries were reduced by 78 percent, suspected minor injuries were reduced by 62 percent, possible/unknown severity injuries were reduced by 82 percent, and property damage-only crashes increased by 20 percent.

Most impressive is that the study showed that, through 2019, fatalities were reduced to zero, and crashes overall were reduced by 24 percent.

“Pennsylvania didn’t have many roundabouts until recent years, and many people were concerned that they would actually cause more accidents,” said PHIA Managing Director Jason Wagner. “But the data prove that the opposite is true. And not only are they safer, they usually improve traffic flow as well.”

PennDOT notes that 34 other roundabouts have been built on state routes, with another 40 in design.

To learn more about roundabouts, visit PennDOT’s roundabout page at this link.

 

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