Which is an appropriate action if you encounter an aggressive driver?

When encountering an aggressive driver, calling 911 to report them is an appropriate action because it ensures that law enforcement can intervene if necessary. Aggressive driving can lead to dangerous situations on the road, including road rage incidents, collisions, and injuries. By reporting the aggressive behavior, you not only protect yourself but also help prevent potential harm to others on the road. Authorities can take steps to address the situation, which is much more effective than attempting to handle the behavior on your own.

In contrast, responding with gestures or tailgating can escalate the situation and could lead to confrontation or accidents. Taking a shortcut to avoid them may not address the underlying issue of aggressive driving and could also place you in a potentially hazardous situation if you're rushing to evade the driver.