MIAMI -- For the second consecutive year, rude Miami drivers have earned the city the title of worst road rage in a survey released May 15, according to AutoVantage, a Connecticut-based automobile membership club offering travel services and roadside assistance. Other cities near the top of the rude drivers list were New York, Boston, Los Angeles and Washington, D.C.

The most courteous drivers can be found in Portland, Ore.; Pittsburgh; the Seattle-Tacoma area; St. Louis; and Dallas-Fort Worth, the survey found. Portland drivers were the least likely on the list to see other motorists tailgating on the roadways, and St. Louis motorists were the least likely to swear at another driver, according to the survey. Minneapolis-St. Paul was rated the most courteous city in 2006, but it slipped to the middle of the list this year.

The most frequent cause of road rage cited in the survey was impatient motorists. Drivers also said road rage can stem from poor driving in fast lanes and driving while stressed, frustrated, or angry.

More than 2,500 drivers who regularly commute in 25 major metropolitan areas were asked to rate road rage and rude driving in telephone surveys between January and March. The survey was conducted by Prince Market Research has a margin of error of plus or minus 2 percentage points.

Residents in the following 25 cities were surveyed and are listed in order from those reporting the most incidents of road rage to the fewest:

1. Miami
2. New York
3. Boston
4. Los Angeles