New York City will start rolling out more speed cameras and will have 720 by June of 2020. The hours of operation will expand from 6am to 10pm weekdays. This is an expansion from 7am to 4pm on school days. This is part of Mayor De Blasio's vision zero policy.
Moreover, the speed cameras can be placed in a 4 square mile parameter around a school. This means that the City will maximize those locations where the can catch the most speeders and generate the most money.
While its true it will help school safety, the main purpose is to generate income for the City. If it was simply a school safety issue, the City would install speed bumps around schools,