TORONTO, Ont. – A study on road rage conducted by the Centre for Addiction and Mental Health shows drivers who weave in and out of traffic and cut in front of cars drive people crazy more than any other driving behaviour.

The study shows driver aggression is a major safety concern, with estimates showing this behaviour is a factor in nearly half of all motor vehicle crashes.

Researchers for CAMH evaluated more than 5,000 entries posted on roadragers.com between 1999 and 2007.

Dr. Christine Wickens, the lead researcher, is advising drivers to work hard at keeping cool while behind the wheel, by reminding themselves to take a deep breath, stay calm and do whatever it takes to keep anger levels at bay.