What is the function of a warning beacon in a work zone?

• A. To alert drivers to detour routes ahead.
• B. To alert pedestrians about crossing.
• C. To provide decorative lighting for the work zone.
• D. To alert drivers to approaching hazards or changes in traffic pattern.

Answer: (D)

Warning beacons in a work zone are there to alert drivers to approaching hazards or changes in traffic pattern. The flashing or steady light catches attention and signals that conditions ahead are different from normal driving, so drivers should slow down, be prepared for lane shifts or workers, and follow any temporary signs or signals. This purpose directly addresses safety by giving drivers advance notice of what to expect. Detour routes are indicated by signs directing alternate paths, pedestrians have separate warning or crossing signals, and decorative lighting isn’t used for safety purposes, so those options don’t describe what a warning beacon is for.