Here is an example summary of this reading selection:

In “Rambos of the Road” Martin Gottfied describes what he calls “auto macho” or road rage. He offers examples of being chased for passing someone and a lengthy example of an incident at the Lincoln Tunnel in which a driver was so enraged that he finally drove into the bus on purpose. Why is the phenomenon road rage growing so common? Gottfried believes that is because we have become a nation of bullies when protected in the “fortresses” of our cars.

Your summary will differ from this one in the way it is written, but it should include roughly the same information.