Jurisdictions in the United States (including overseas territories) and Canada have adopted various school bus stop laws that require drivers to stop and wait for a stopped school bus loading or unloading, so as to protect school children boarding or alighting.
Generally, if a stopped school bus is displaying a flashing, alternating red lamp, a driver of a vehicle meeting or overtaking the stopped bus from either direction (front or back) must stop and wait until the bus moves again or the red light is off. Police officers, school crossing guards, and even school bus drivers themselves may have the power to wave traffic on, even when a red light is flashing.
On divided highways, most American and Canadian jurisdictions do not require vehicular drivers to stop when on the opposite side of the road from a stopped school bus. Those that
do require vehicles to stop are:
- West Virginia upon a non-controlled-access highway{§17C-12-7}
- Arkansas in case a divider has less than 20 feet (6 m) in width (narrow divider).
- New York State
- American Samoa
- Guam
- British Columbia
- Nova Scotia
- Prince Edward Island
- Northwest Territories
- Nunavut