Which color sign warns drivers of road construction or repair?

Signs that are orange in color are specifically designated to warn drivers about road construction or repair activities. This color is used to alert motorists to potential hazards associated with construction zones, such as workers on or near the road, changed traffic patterns, or lane closures.

The use of orange is standardized across the United States to ensure that drivers can easily recognize and respond to construction-related warnings. This enhances safety for both the workers who are on-site and the drivers navigating through these potentially hazardous areas. The effectiveness of orange in warning signs lies in its bright visibility, allowing drivers to notice and react appropriately to road conditions requiring caution.