What is the minimum distance for placing the first warning device in a situation requiring a 100-foot margin of safety?

In situations where a 100-foot margin of safety is required, placing the first warning device at a distance of 100 feet from the point of potential hazard is crucial. This ensures adequate warning to oncoming vehicles and helps prevent accidents by giving drivers sufficient time to react and adjust their speed or trajectory. The intent behind this guideline is to create a safe buffer zone, allowing for the proper dissemination of warning signals and minimizing risks in hazardous areas, such as at the scene of an accident or road construction.

If the first warning device is placed closer than the required distance, it reduces the effectiveness of the warning and may not give approaching traffic enough time to respond, thus compromising safety. Therefore, the correct choice of placing the warning device at a distance that matches the specified 100-foot margin is essential for maintaining safety standards on the road.