How far in advance must you place reduce speed limit signs before a work zone?

The correct distance to place reduced speed limit signs before a work zone is 600 feet. This guideline is established to ensure that drivers have adequate warning of the upcoming changes in speed limits due to construction or maintenance activities. The 600-foot mark provides enough time for vehicles to slow down safely, allowing for a smoother transition into the work zone while enhancing safety for both motorists and workers.

Proper advance notice is critical in protecting the safety of all involved. A distance of 300 feet might not give drivers sufficient time to react, particularly at high speeds, while longer distances such as 1 mile or 1.5 miles may be unnecessary and potentially lead to confusion or signage clutter that could diminish the effectiveness of the warning. Providing the correct distance helps maintain order on the road and promotes compliance with speed regulations.