What is a potential danger of stopping in an acceleration or merging lane?

Stopping in an acceleration or merging lane poses a significant danger of being rear-ended by another vehicle. These lanes are specifically designed for vehicles to accelerate to the speed of traffic or to merge safely into a flow of vehicles. When a vehicle unexpectedly stops in such a lane, it creates a sudden obstacle for other drivers who are expecting a clear roadway. The vehicles behind may not have sufficient time or distance to react, leading to a high likelihood of a collision.

Other factors, while important, do not carry the immediate physical danger of being struck from behind, which is a direct consequence of creating an unexpected stop in a fast-moving area. Impeding traffic flow is indeed a problem that arises from this behavior, but the immediate risk is the potential for a rear-end collision, making it a critical safety concern. Blocking wildlife migrations, although a relevant issue in certain contexts, is less applicable in urban driving scenarios. Not signaling before stopping is also a safety concern, but it does not hold the same level of immediate danger as stopping unexpectedly in an acceleration or merging lane.