INDIANAPOLIS (AP) — Indiana State Police are urging drivers to be aware of the need to stop for school buses as students return back to classrooms following summer break.

State police say they receive numerous complaints every year about school bus stop arm violations from school corporations. The Indiana Department of Education says in 2014 on one day there were 2,577 stop arm violations reported in Indiana. That’s up from 932 reported on one day in 1999.

State police that drivers approaching a school bus, from any direction, that is stopped with its flashing red lights activated and its stop arm extended, are required to stop, even on multiple lane highways. Violators face a maximum fine of up to $10,000.