What sign warning indicates road construction is ahead?

The correct answer is associated with the use of orange signs, which are specifically designated for warning drivers about road construction and maintenance areas. These orange signs are easily recognizable and serve to alert drivers that they should be prepared for potential hazards, such as detours, reduced speed limits, or shifting traffic patterns. The color orange is universally understood in roadway safety to signify caution regarding temporary conditions that may affect driving.

In contrast, red signs typically indicate prohibitive actions, such as stop signs or yield signs, and are not used for construction warnings. Blue signs are generally utilized to convey information about services, such as rest areas or gas stations, while green signs provide direction or indicate permitted movements. The use of distinct colors for specific types of signs helps to create clarity and ensures that drivers can quickly recognize important information while navigating roads.