The best way to deal with tailgaters is to:

Check the traffic behind you several times a minute to know if another driver is tailgating, approaching too fast, or trying to pass. If another car is following you too closely, slow down and let it pass. Most rear-end collisions are caused by vehicles following too closely.

• Speed up to increase the distance between you and the tailgater.
• Slam on your brakes to get the other driver to back off.
• Change lanes or gradually slow down to encourage them to pass.
• Ignore them.