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Evaluate left turn safety treatments

Left turns are a key factor in nearly 30 percent of pedestrian crashes involving a fatality or serious injury. DOT is evaluating an array of design treatments at 100 locations to determine if they encourage motorists to better yield to pedestrians and to slow vehicle turns. If successful, these designs will be expanded to additional intersections across the City. 

Strategic Plan 2016 Initiative


Related OneNYC Initiative


Short-Term Milestones (by end of 2017)


Update Description

DOT will implement and evaluate left turn safety treatments at 100 locations. If successful, DOT will expand the project further to priority intersections.


Based on the 2016 Don’t Cut Corners: Left Turn Pedestrian and Bicycle Crash Study (, DOT developed and implemented a 107-intersection pilot initiative in 2016 to test left turn traffic calming treatments. The treatments include elements such as flexible delineators, temporary curbing, plastic bollards, and road markings. Evaluation of these treatments has shown a 19.9% reduction in median turning speeds as well as safer  turning behavior: the rate of crossing the double yellow line while turning has dropped by 97.6%. Left turn traffic calming treatments were installed at an additional 110 location in 2017, and program evaluation and implementation is ongoing.

Medium-Term Milestones (by end of 2021)


Update Description