What is a key factor in establishing the safe distance for warning devices?

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The safe distance for warning devices is primarily determined by the speed limit of the roadway. This is because vehicles traveling at higher speeds require more advanced warning to react appropriately and reduce their speed in response to any hazards or changes in traffic conditions. The faster the vehicles are moving, the longer the distance needed to safely notify drivers about upcoming road work, detours, or obstacles.

For instance, if the posted speed limit is high, warning devices must be positioned further down the road to give drivers adequate time to process the information and respond safely. This distance is often calculated based on a standard formula that takes into consideration the speed of travel. Therefore, a key factor in establishing this safe distance is indeed the speed limit, as it directly influences the effectiveness of the warning devices and the overall safety of road users.

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