With area students headed back to class this week, State Police and state transportation officials are reminding motorists when they do and don't have to stop for school buses.

State Police and the Louisiana Department of Transportation and Development shared a handy chart on social media Monday laying out the rules for when motorists encounter school buses.

The rules can differ depending if the road is two lanes, three lanes, four lanes or a divided highway with or without grass medians:

Two lanes

Vehicles traveling in each direction are required to stop when the bus's red lights are flashing.

Three lanes

When the highway has a center turning lane with one travel lane on each side, vehicles traveling in each direction are required to stop when the bus's red lights are flashing.

Four lanes

Vehicles traveling in each direction are required to stop when the bus's red lights are flashing.

Divided highway with grass median or barrier

When the highway has a grass median or other physical barriers, only traffic moving in the same direction as the bus is required to stop when the bus's red lights are flashing. Oncoming traffic should proceed with caution.

Divided highway with center turning lane

When the highway has a center turning lane with two travel lanes on each side, only traffic moving in the same direction as the bus is required to stop when the bus's red lights are flashing. Oncoming traffic should proceed with caution.