Lane Narrowing Ahead Warning Sign - Road Safety Guidance #157733 (License: Personal Use)

The image shows a mandatory UK/European-style warning sign: a red-bordered equilateral triangle with a white background and a black pictogram of two parallel lines converging on the right, indicating the right lane ends and traffic must merge left. This sign is typically placed 150-300 meters before the narrowing point on multi-lane roads to allow safe lane changes.

Used on highways, dual carriageways, and urban arterials where lane reductions occur due to construction, accidents, or permanent road design. It serves drivers seeking real-time hazard awareness and supports navigation systems and driver education content.