ANTIOCH (CBS SF/BCN) — A fatal collision in Antioch on Highway 4 Sunday night left one person dead and shut down westbound lanes, according to a California Highway Patrol report.

The crash was first reported to the CHP around 9 p.m. Sunday on westbound Highway 4 just west of Highway 160, where a vehicle hit the center divide.

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Upon the arrival of emergency personnel and CHP officers, it was determined that a silver Chevrolet Impala had been driven off the roadway.

The vehicle had crashed through the metal guardrail and subsequently catapulted into a metal sign pole. The Chevrolet sustained major intrusion damage to the driver side.

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According to authorities, the solo driver of the car — a 41-year-old male Antioch resident — sustained fatal injuries and was pronounced deceased by medical personnel. Authorities did not identify the driver or say whether alcohol or drugs were a factor in the collision.

CHP Contra Costa issued a Sig-Alert at 9:21 p.m. because two lanes were blocked. At 9:41 p.m., the Sig-Alert was updated to say three lanes will be blocked for approximately 90 minutes.

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Anyone who witnessed the collision or related events leading up to the fatal crash is asked to contact Contra Costa CHP in Martinez at (925) 646-4980.