CONCORD - A dump truck driver likely saved a motorist’s life after using his truck to block traffic after an accident Tuesday morning on Interstate 89, state police Lt. Mark Armaganian said.

Police said Christopher Richard, 31, of Antrim, was heading south on I-89 north of exit 2 about 7:45 a.m. Tuesday when his car drifted to the right and bounced off a guard rail. His car went back into the road and hit a car driven by Peter Kalpakgian, 24, of Warner.

Both cars went into the grass median. Richard’s car rolled over several times, and he was thrown from the car and landed in the center of the northbound lanes.

Armaganian said Lenny Hall, a dump truck driver for Dirt Doctors of Concord, witnessed the accident and prevented it from being far worse by blocking northbound traffic with his truck after seeing Richard lying in the road.

“He had the presence of mind to put it across the roadway to block traffic so the person in the roadway wouldn’t be run over,” Armaganian said. “If he hadn’t acted, this would have been a fatality, no doubt about it.

“He did the right thing,” Armaganian said of Hall. “He did a really good job.”

Brian Boudreau, a fellow employee at Dirt Doctors, said Hall’s actions were no surprise to him or other employees at the landscaping business.

“It’s definitely within his character,” Boudreau said.

Richard was taken to Concord Hospital with serious, but not life-threatening, injuries, police said. Police said fatigue may have caused the crash and said drugs and alcohol do not appear to be a factor.