Under what circumstances may flags be used in traffic control?

Flags are primarily utilized in traffic control during emergencies, specifically when visibility is diminished or when traditional traffic signals and signs are either inoperative or ineffective. Traffic control personnel may employ flags to direct drivers and enhance safety in unexpected situations, such as accidents or hazardous conditions.

Using flags under these circumstances allows for immediate response and flexibility, enabling personnel to communicate vital traffic instructions that can help prevent collisions and ensure the safe flow of vehicles. This urgent, situational use aligns with established protocols for managing traffic during crisis scenarios.

While there are practices for routine signal management, general guidance, and even crowd control, those contexts typically entail the use of more standardized traffic signals, signage, or temporary lane closures rather than the use of flags. Flags are specifically intended for quick, impactful communication in emergencies, highlighting their crucial role in maintaining safety when conventional methods are not viable.