A Northport man with a reported history of road rage was summoned by police after a witness alleged he nearly caused an accident on Route 1 on May 18.

William S. Magruder, 52, was summoned on a charge of driving to endanger after a driver who witnessed and reported the incident told police Magruder’s aggressive driving nearly caused another car to go off the road and into the median ditch.

According to Belfast Police Chief Jeffrey Trafton, the witness, whose identity is not being released and who reported the incident to police at about 4 p.m., said he was driving behind Magruder, who was driving his 1989 Marmon dump truck south on Route 1.

The witness told police that Magruder accelerated toward a tan sedan that was ahead of Magruder on Route 1. According to the witness, Magruder came up behind the sedan and then backed off. The witness told police Magruder accelerated again, but this time drove up beside the car and then backed off. Magruder allegedly accelerated a third time, came up on the right and swerved in the sedan’s direction, according to the witness.

The witness told police he thought the driver of the sedan, whom he had seen swerve in order to avoid Magruder, was in danger of going off the road and into the median. According to the police, no accident occurred. The witness reported that the driver of the sedan took the next exit off Route 1.

Police said the witness followed Magruder to the intersection of Route 1 and Route 52, where he recorded the registration plate number from Magruder’s truck and promptly reported the incident to the police.

Trafton said this is the third time in two years Magruder has been charged with driving to endanger by local law enforcement agencies. Both of the previous charges, Trafton said, were the result of accidents in which Magruder was displaying road rage.

Magruder is the owner of Suydam & Sons General Contracting in Northport; he was driving a company truck at the time of the May 18 incident, according to police.