Only traffic trailing the school bus are required to stop when travelling on a highway divided into four traffic lanes.
When a school bus displays its mechanical stop signal or flashing red lights to receive or discharge passengers, the driver of any other vehicle approaching the school bus must stop and not attempt to pass the school bus until the mechanical stop signal is withdrawn, the flashing red lights are turned off, and the bus has begun to move. Highway divided into four or more lanes by a median divider or a centre turning lane: Only traffic trailing the school bus must come to a halt when it stops for passengers. In other words, only cars approaching the back of the bus and moving in the same direction as the bus are permitted.
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