Schools typically have an abundance of pedestrian activities and vehicle drop-off and pick-up. Because of these conditions, the State allows for reduced speed limits adjacent to the facilities when certain warrants are met.
MassDOT warrants will allow a 20 mile per hour zone for locations where the school property abuts the public street, there is an established crosswalk and where the school has grades 1 through 9. When approved; the school zones are typically in effect during the morning arrival times, and afternoon dismissal times. A small sign, attached to the speed limit sign, notifies drivers of the times 20 miles per hour is in effect.