ST. LOUIS COUNTY - Kids are back in class which means drivers need to watch for school buses with flashing red lights.

Safety experts say the greatest risk for kids is not riding the bus, but getting on and off of it.

A bus driver here in the Mehlville School District says on average, three cars a day will actually drive around the side of his bus when his red lights are flashing. Most of the time when you see those red lights, you have to stop for the bus, but that's not always the case.

Here are the rules of the road on both sides of the river, according to police.

Let's say you're driving on a two-lane road. All traffic must stop for a school bus with flashing red lights.

Now, what about a two lane road with a turn lane in the middle? Again, all traffic, including the turn lane, must stop.

With a four lane road, traffic travelling with the school bus must stop. Traffic in the opposite direction should keep going.

"Oh some people go around us, yes ma'am. They go around the bus. They don't want to wait for the unloading or loading of the bus. There's people that need to start learning what the rules are," said bus driver Jim Wiemann.

According to the National Highway Traffic Safety Administration, over the past decade 44 children and teens in the U.S. were killed in school zones travelling to or from school.

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