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Question:

The zone that extends as much as 30 feet from the front bumper, 10 feet from the left and right sides of the bus and 10 feet behind the rear bumper of the school bus is called what?

A Danger Zone.
Explaination

The danger zones may extend as much as 30 feet from the front bumper (with the first 10 feet being the most dangerous), 10 feet from the left and right sides of the bus, and 10 feet behind the rear bumper of the school bus.