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Social and Behavioral Sciences Commons

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Economics

Theses and Dissertations

2023

Difference in Difference

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The Effects Of Lower Speed Limits On Fatalities And Serious Injuries, Naufa Nuha May 2023

The Effects Of Lower Speed Limits On Fatalities And Serious Injuries, Naufa Nuha

Theses and Dissertations

Responding to concerns about road safety, New York City passed a law called Vision Zero in 2014 that progressively decreased all local road speed limits to 25 miles per hour. This was in an effort to increase road safety from collisions. Starting a year prior to Vision Zero, the city started lowering speed limits in certain high-risk roads. I use data on accidents from New York City Open Data to examine the effect of reducing speed limits in Manhattan. The analysis exploits the implementation of lower speed limits on some roads prior to 2014 that provides a quasi-experimental design. Estimates …