(CNN) -- Are you prone to road rage?

You can find out in a public awareness campaign called "Gauge Your Rage," which is being conducted by Nissan North America and Dr. Jerry Deffenbacher, a Colorado State University psychologist and professor who has been studying aggressive driving and anger management since the early 1980s.

As Thanksgiving begins the holiday seasons, America's roads will fill with three times their normal traffic volume, increasing the chance that road rage will erupt.

The public awareness campaign is aimed at reducing the growing phenomenon. It offers a 14-question quiz aimed at helping people determine how anger affects their driving behavior. The quiz asks you to rank how much certain driving situations would anger you by assigning them a number between 1 (not at all) and 5 (very much).

For example, you're asked to imagine how you would react if:

Unpleasant situations all, to be sure, but Deffenbacher offers advice for dealing with those and similar roadway troubles.

Among his tips are ways to reduce your own anger -- including relaxation techniques such as deep breathing. The tips also advise angry drivers to analyze just what it is that is making them so mad.

"Knowing what triggers anger is paramount to managing it," Deffenbacher said. "Today's societal pressures, increased road congestion and busy schedules have led to significant increases in aggressive driving. What Nissan and I have provided will help people deal with anger and, we hope, decrease these incidents."

The campaign also offers advice on reacting to someone else's road rage, such as this warning:

"Take road rage seriously. You could be dealing with a volatile, unstable person with a gun, or a person who, at the slightest provocation, may ram your car or attack you. It pays to be cautious: Treat every instance like a dangerous, explosive situation."

A description of the "Gauge Your Rage" program on Nissan's Web site says that aggressive driving is becoming a national epidemic and cites the National Highway Traffic Safety Administration's estimates that angry drivers have been to blame for 2.28 million crashes and 27,935 traffic fatalities in the past five years. Reported incidents of road rage have doubled over the last two years.

You can get the free "Gauge Your Rage" quiz and quick reference guide by calling 1-800-782-8678 or by downloading them from Nissan's Web site.