The speed limit will be lowered to 15 mph around all the city’s thousands of schools by 2029, Mayor Zohran Mamdani announced Monday – as insiders quietly revealed the slow-as-dirt zones will be enforced 24/7. The mayor will invoke Sammy’s Law – a 2024 measure allowing city officials to set speed limits below the state minimum – in his executive action to lower the speed limits and fulfill a goal long-sought by street safety advocates.