Under what conditions should traffic cones or flares be started at 25 MPH?

Using traffic cones or flares at a speed of 25 MPH is determined by the need to clearly alert drivers of obstacles or hazards in the roadway. The proper distance for deploying these warning devices is essential for ensuring that approaching drivers have enough time to react to the situation safely.

The correct distance of 65 feet aligns with safety protocols aimed at providing a visible warning to drivers while considering their stopping distance and reaction time, especially at lower speeds like 25 MPH. This distance allows drivers adequate time to notice the cones or flares and adjust their speed or direction in response to the hazard, minimizing the risk of accidents.

In contrast, the other distances do not provide the same level of safety or visibility for the situation. Distances that are shorter may not give enough warning, while longer distances may be excessive for the speed in question, thereby leading to potential confusion or misinterpretation of the hazard's severity. Thus, 65 feet is the standard recommendation to ensure the safe use of traffic cones or flares when traffic is moving at 25 MPH.