Typically, tailgaters are aggressive drivers, but sometimes other elements are factors in a tailgating crash.
Some of the most common causes of tailgating include:
Road rage and reckless or aggressive driving
Drunk driving
Ignorance of safe traveling distance
Driving while drowsy or fatigued, or even falling asleep at the wheel
Distracted driving
Impatience, often resulting from lateness or traffic congestion
Texting while driving