What contributes to secondary crashes?

Secondary crashes often occur in the context of a primary incident, typically as a result of the traffic flow disruption caused by that initial event. When a vehicle incident happens, it can lead to sudden stops or slowdowns, which can catch other drivers off-guard, increasing the likelihood of additional collisions. This can happen within the immediate vicinity of the previous crash or in the increased traffic backup that follows.

Other factors contributing to secondary crashes can be related to conditions like adverse weather or driver behavior, but the direct link between a primary incident and subsequent crashes makes option B the most accurate choice. Additionally, while aspects like driver negligence at traffic lights, ambiguous road signs, and weather conditions do influence traffic safety, they are not directly caused by an existing crash and its aftermath, making them less relevant to the concept of secondary crashes. The scenario surrounding option B illustrates the critical need for timely and effective traffic incident management to minimize further incidents and ensure road safety.