What signals can a park warden use to stop a vehicle?

A park warden is authorized to use flashing red or blue lights as well as a hand signal to effectively signal a vehicle to stop. The use of these lights is consistent with common practices employed by law enforcement and authority figures, which aids in ensuring that drivers recognize the command to stop. The flashing lights serve to attract immediate attention and indicate that the vehicle must yield, while the hand signal provides a clear visual direction that reinforces the request.

While the other options offer methods of signaling, they do not align with the established protocols for stopping vehicles in a manner that is recognized and respected by drivers on the road. For instance, a whistle and visual flagging may not be as effective for commanding vehicles due to their typical association with pedestrian or event management rather than law enforcement. Moreover, sirens and horns, while effective for alerting, are not typically employed by park wardens in the same way as lights. Finally, traffic cones and roadblocks are utilized more for controlling the flow of traffic or directing vehicles rather than actively signaling a specific vehicle to stop. Thus, the combination of flashing lights and hand signals remains the most authoritative and widely accepted method for park wardens to manage traffic situations effectively.