Which of the following is a key element in traffic control safety?

Timely maintenance of signage is a key element in traffic control safety because proper signage plays a critical role in informing drivers and pedestrians about changing traffic conditions, detours, and safe paths of travel around work zones. Signs must be visible, clear, and positioned correctly to ensure that all road users understand the rules and precautions in place. Regular maintenance, such as repairing damaged signs, ensuring they are free from obstructions, and updating any outdated information, ensures that the traffic control system operates effectively.

This proactive approach enhances safety by minimizing confusion and helping to prevent accidents, ultimately protecting both workers in the area and the traveling public. In contrast, other options such as using only one type of sign or restricting vehicle access completely are not practical or comprehensive strategies for ensuring traffic safety, and eliminating flaggers can leave critical gaps in traffic management where oversight is needed. The focus on timely signage maintenance underscores the importance of clear and effective communication on the road.