When traveling at restricted speed, a train or equipment must be able to:

The primary goal when a train or piece of equipment is traveling at restricted speed is safety, particularly the ability to respond effectively to potential hazards. Stopping within half the range of vision of any potential hazard ensures that the train or equipment can react appropriately if an obstacle or danger arises. This means that operators must be able to stop the train before reaching the hazard, thus minimizing the risk of collisions or accidents.

This principle is fundamental to the Roadway Worker Protection program, as it establishes a safety standard that allows workers to operate in or near tracks without the heightened concern of being struck by moving trains. The other options, while they may relate to vehicle operation in different contexts, do not prioritize the critical aspect of hazard recognition and response required at restricted speeds.