Randy Shereda, 50, was driving home from his job as a transportation security supervisor. Suddenly, a pickup truck cut off his Chrysler LeBaron from the right, using the Spring Mountain Road exit lane on northbound Interstate 15.

Not long ago, all Shereda could do was add the motorist to his list of least-favorite people. Now, he adds a license plate to a long list at platewire.com, along with a description of the traffic transgression.