Mayor Zohran Mamdani is moving to slow New York City drivers way down near schools, ordering the Department of Transportation to cut speed limits to 15 mph in roughly 800 designated school slow zones across all five boroughs. City Hall is pitching the move as an early, targeted use of the city’s new authority under Sammy’s Law, aiming to reduce both the odds of crashes and the severity of injuries when children are struck. Officials say the lower numbers on the signs are meant to be paired with street redesigns and enforcement in the months ahead.
What Mamdani announced
In comments cited by the New York Daily News, Mamdani called the school slow zone expansion “just the beginning” and said his administration will start work on the changes right away. According to the outlet, the 15 mph limits would only kick in after a required 60 day public comment period, and a spokesman said the city’s goal is to bring the 15 mph cap to every school zone by the end of 2029. DOT Commissioner Mike Flynn told the paper that “speeding is the leading cause of traffic deaths,” a line the administration is leaning on to justify the crackdown.
Sammy’s Law and the data behind it
City officials are relying on the 2024 statute known as “Sammy’s Law,” named for 12 year old Sammy Cohen Eckstein, who was killed after running into the street in 2013. The law gives New York City the power to drop local speed limits below the previous statewide minimum, the governor’s office noted in a press release. Under that authority, DOT can now set a 20 mph baseline limit and, on specially redesigned streets, go as low as 10 mph. The governor’s release also points out that more than 2,400 school zone speed cameras are already operating citywide after an earlier expansion of that program.
How DOT will roll the changes out
DOT says it will roll out the new school speeds neighborhood by neighborhood, leaning on Vision Zero crash data to decide which school streets get 15 mph signs first and pairing those limits with engineering tweaks on the ground. Reporting from the New York Daily News notes that City Hall plans to convert most existing 20 mph school slow zones to 15 mph and then add another batch of 15 mph locations as community review wraps up. DOT has already tried out “Regional Slow Zones” and targeted 20 mph corridors, and agency releases say the department wants to link the lower limits with enforcement and redesign projects whenever possible.
Reaction from advocates and critics
Street safety advocates quickly lined up behind the move. Transportation Alternatives has argued that combining lower posted speeds with cameras is a proven recipe for saving lives. On the other side, cycling advocates and some community boards are wary of blanket slowdowns, warning that smaller numbers on signs need to come with protected infrastructure and careful enforcement. That concern has been highlighted by local outlets including Streetsblog.
What’s next
The 15 mph limits will not be official until DOT runs the full 60 day public comment process and posts final signage, and city officials say neighborhoods should expect to see the proposals debated at community board meetings before the signs go up. New Yorkers who want to track or weigh in on the rulemaking can keep an eye on DOT’s official notices and the city’s regulatory calendar for details on the comment window.
