Which signs communicate that a lane is closed ahead?

• A. Stop Sign Ahead
• B. Yield Sign Ahead
• C. No Parking
• D. Lane Closed Ahead signs or Detour signs indicating the closure ahead

Answer: (D)

When you’re approaching a portion of the road where a lane will no longer be available, you need clear advance warning to adjust your speed and merge safely. Signs that say Lane Closed Ahead tell you the lane you’re in is going to be closed ahead, so you can plan to shift into an open lane before you reach the closure. If there’s a required change in route, Detour signs indicating the closure ahead guide you around the blocked area. These signs directly communicate the change in lane availability and the needed action, which is essential for maintaining smooth traffic flow and safety in work zones or construction areas.

Signs that say Stop Ahead or Yield Ahead warn you about upcoming stop or yield signs, not about a lane closure. No Parking informs drivers about parking restrictions and has no relation to lane closures.