How far from a speed warning sign must a vehicle be before it can legally stop?

The correct answer indicates that a vehicle must be at least 500 feet from a speed warning sign before it can legally stop. This distance requirement is established to ensure that drivers have adequate time to react to the warning sign, adjust their speed, and maintain safety on the road. By enforcing a minimum stopping distance, the law helps prevent abrupt stops that could lead to accidents, particularly on busy or high-speed roadways where sudden stopping could endanger the driver and other road users. Additionally, such regulations aim to enhance overall traffic flow by minimizing interruptions caused by unexpected stops near warning signs.