What is the minimum recommended distance for advance warning signs before a work zone?

The minimum recommended distance for advance warning signs before a work zone is 500 feet. This distance is established to provide drivers with ample time to prepare for changes in traffic patterns or conditions, such as merging, lane closures, or reduced speed limits. The 500-foot distance allows motorists to make necessary adjustments safely and effectively, minimizing the potential for accidents or disruptions as they approach the work zone.

Advance warning signs serve to alert drivers about upcoming road work and the associated need for caution. By placing these signs at a significant distance, transportation agencies aim to enhance safety for both the workers in the zone and the motorists navigating through or around the construction area. This advance notice is particularly crucial in maintaining a smooth traffic flow and reducing the likelihood of sudden stops or erratic driving behavior as drivers encounter unexpected obstacles.