In the event of an accident, when may a school bus driver leave the vicinity of the bus to seek aid?

In the event of an accident, a school bus driver may leave the vicinity of the bus to seek aid when no student aboard can summon help. This is crucial because the safety of the children on the bus is the driver's primary responsibility. If the driver determines that the situation is dire and that none of the students can effectively reach out for assistance, then it becomes necessary for the driver to take action and seek help to ensure the well-being of everyone involved.

Leaving the bus under other circumstances might pose risks, such as leaving students unattended or exposing them to potential dangers from traffic or other hazards. Therefore, the expectation is that the driver assesses the situation and prioritizes student safety, ensuring that assistance is called for if it's deemed that no other means of obtaining help is available.