Two people died in separate vehicle collisions Saturday night, one of them in Phelan and another on Highway 395 just north of Adelanto.

The first fatal collision took place at approximately 5:40 p.m. on Highway 395 between the Adelanto city limit and Shadow Mountain Road, said Jeff Perez, public information officer at the California Highway Patrols'' Victorville office.

Joseph Epperson, 22, of Riverside, was driving his Mitsubishi southbound at a "high rate of speed," according to CHP, when he attempted to pass a Ford Ranger driven by Jill Lachman, 53, of Laguna Woods.

Meanwhile, Frederic and Betty Stodieck, 62 and 56, both Nevada residents, were driving northbound on Highway 395 in their GMC Envoy. Epperson crossed the double yellow lines to pass Lachman and, in an attempt to avoid the Stodieck''s Envoy, he swerved abruptly to the left, Perez said.

Epperson lost control of his vehicle and was struck on the driver''s side by the Envoy. Emergency personnel pronounced him dead at the scene, Perez said. "The blunt force was what killed him."

Frederic and Betty Stodieck sustained moderate injuries, and Lachman was not injured, according to the CHP.

Highway 395 was closed for approximately four hours and 20 minutes during the investigation and cleanup.

The second fatal collision occurred at approximately 8:45 p.m. in the Phelan area, on Duncan Road just west of Barker Road, and involved a man driving under the influence of alcohol. Duncan Road is the western extension of Bear Valley Road.

Fifteen-year-old Alexis Lane of Phelan was pronounced dead at the scene, after the driver of the Ford pickup in which she was traveling - 20-year-old Eric Asay of Phelan - rear-ended the vehicle in front of him and lost control of his pickup.

Inside the pickup, authorities found an open container of alcohol, Perez said, although he did not have more details. Asay was arrested on charges of vehicular manslaughter, driving under the influence of alcohol and possession of alcohol in a vehicle.

Authorities could also file manslaughter charges against 23-year-old Phelan resident Lyle Walters, Perez said, for "brake checking" Asay when he drove too close to Walters'' Honda as both men drove west on Duncan Road. This caused Asay to lose control of his vehicle and drive through the fence of a home located at the northwest corner of Duncan Road and Barker Road, Perez said.

The Ford pickup was wrapped around a Joshua tree, and a branch had punctured the windshield, causing blunt force trauma to the girl. Asay sustained only minor injuries, according to the CHP, and Walters complained of head and neck pain.

Perez said the biggest problem with slamming on the brakes to punish tailgaters is that it can end up making them more aggressive. "Brake checking creates a problem more in terms of road rage and getting people upset."

Both collisions remain under investigation.