When are flags used in road construction zones?

Flags are utilized in road construction zones primarily to direct traffic and enhance safety during roadwork operations. This is crucial as construction zones often involve changes in traffic patterns, potential hazards, and the presence of workers and equipment. The use of flags allows for clear communication between flaggers and drivers, guiding vehicles through potentially confusing or dangerous areas. Flaggers are trained to manage the flow of traffic, ensuring that it moves smoothly and safely while minimizing the risk of accidents.

The other options, while related to traffic management, do not accurately capture the primary function of flags in these scenarios. Flags are not typically used to signal the end of a construction zone or to indicate parking restrictions; instead, they focus on actively managing traffic flow. Additionally, while flags may be used in conjunction with a detour, their main role in construction zones is the immediate direction of traffic rather than marking detours.