What must you reckon with when you see this traffic sign?

This traffic sign warns of a possible traffic jam ahead. When you see it, you must be prepared for congestion and recognize that vehicles in front of you may suddenly brake. Drivers should increase their attention, reduce speed, and keep a safe distance. It does not indicate that the road will widen; instead, it alerts you to traffic conditions that could require quick reaction. Recognizing and reacting properly to this warning helps prevent rear-end collisions in slowed or stopped traffic.