It was the first day of school in some districts and police are already having to remind drivers about safety rules.
Grand Ledge police sent out a warning telling them to stop for all crossing guards.
Drivers also need to yield to pedestrians in crosswalks.
Police will also be watching out for drivers going around school buses.
Bottom line, you cannot pass a bus when its red lights are flashing.
That applies to drivers going the opposite direction too.
They have to stop unless they're on a road with a concrete barrier dividing the two directions.
And you need to slow down for the yellow lights as well.
"when yellow lights go on the bus, that's not an indication to speed up and pass the school bus" said Trooper Marco Jones with MSP. "That is an indication to slow down and prepare to stop. when those red lights come on and the stop sign comes out, that's exactly what it means; to stop."
Police also have a warning for students and anyone else walking near a bus stop.
Make sure if you have to cross the street in front of a bus you stay at least 10 feet in front of it.
The drivers sit pretty high, so they might not see you if you're right in front of them.