What is critical when you may be at risk of being struck from the rear?

Identifying an alternate path is critical when you may be at risk of being struck from the rear because it allows you to safely maneuver out of a potentially dangerous situation. If you notice a vehicle approaching too quickly from behind, having an alternate route or escape plan in mind can help you avoid a collision. This could involve moving to another lane if it's safe to do so or finding a safe place to pull over.

While other actions listed may seem relevant in certain situations, they do not directly address the immediate need to protect yourself from a rear impact. For example, using your horn might alert the other driver, but it doesn’t change your position on the road. Increasing your speed could create a more dangerous situation by leading to a loss of control or making it harder to react. Turning on hazard lights can warn other drivers of a problem, but it does not provide a proactive measure to escape impending danger. The most effective response in this scenario is to identify an alternate path that ensures your safety.