What is the appropriate action if a driver notices a tailgater?

When a driver notices a tailgater, changing lanes and allowing them to pass is the safest and most effective action to take. This approach helps to reduce the risk of a rear-end collision, which can occur if the tailgater misjudges the distance or speed. By allowing the tailgater to pass, you remove the immediate pressure and stress that may be caused by being followed too closely and create a safer driving environment for both yourself and the other driver.

The other options, such as speeding up to create distance, applying the brakes suddenly, or ignoring the tailgater while maintaining speed, can lead to dangerous situations. Speeding up could further provoke the tailgater or encourage aggressive driving. Sudden braking could result in a collision if the tailgater is not prepared to stop in time. Ignoring the tailgater might leave the driver vulnerable to unexpected behaviors from the tailgater, increasing the likelihood of an accident. Thus, changing lanes to let them go is the most prudent choice.