The Alameda County Coroner's Office released the name of the man who crashed his car and then committed suicide Monday during the evening commute.

John Kelly Jr., 43, of Antioch shot himself in the head after crashing his car into a pole on Vasco Road at about 5:10 p.m. He was pronounced dead at 5:14 p.m.

Kelly was driving south on Vasco. Near the Vasco Road Landfill, he swerved across the northbound lanes, according to the Alameda County Sheriff's Office.

"He sideswiped a telephone pole and ended up in a ditch," sheriff's Sgt. Scott Dudek said. "He took his own life."

Sheriff's Sgt. J.D. Nelson said Kelly was married and had two children.

An off-duty police officer from San Jose saw the crash and walked up to Kelly's car, but it was too late, Dudek said.

"He was thinking he was going to render aid," Dudek said.

The crash and shooting snarled traffic for at least an hour as the California Highway Patrol, sheriff's investigators and the coroner responded to the scene.