What is the main purpose of establishing a "Caution Zone"?

The main purpose of establishing a "Caution Zone" is to provide a safe area for workers and minimize risk from moving trains. It is essential for protecting those on the tracks from the potential hazards posed by train operations. By defining this zone, workers can be assured that they are working in an area that has been specifically designated to keep them safe from incidents, such as being struck by a train. This safety measure is a critical component of the Roadway Worker Protection Program, which seeks to reduce accidents and enhance the overall safety of workers in close proximity to railroad operations.

The other options do not align with the primary function of a Caution Zone. Limiting vehicle operation areas is not the central aim of this designation, and it's unrelated to equipment storage or designated break spaces. The focus is specifically on the safety of workers as they perform their tasks near active train tracks.