What is the purpose of a flashing roadway signal when located above a warning or regulatory sign?

• A. To indicate end of signal
• B. To get a driver's attention
• C. To indicate a detour
• D. To speed up traffic

Answer: (B)

Flashing signals above warning or regulatory signs are attention grabbers. Their job is to draw your eye to the sign so you notice it and read the instruction or warning it conveys, especially in areas where hazards are present or visual clutter could cause the sign to be overlooked. The flashing element itself doesn’t communicate the rule or the hazard; it simply ensures you don’t miss the sign. It isn’t used to indicate the end of a signal, nor to indicate a detour, nor to speed up traffic.