OAKLAND (CBS SF) — A Caltrans contractor suffered major injuries after being hit by a car in Oakland early Wednesday morning, with the driver fleeing the scene.

The California Highway Patrol said officers responded to a report of a vehicle versus pedestrian traffic collision at about 5:19 a.m. at the Bayview Ave. on-ramp to westbound Interstate Highway 580.

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A preliminary investigation determined a dark-colored sedan hit a Caltrans contractor who was preparing to shut down lanes as part of a construction crew, the CHP said.

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The contractor was severely injured and had to be life-flighted to a regional trauma center. No license plate or driver description was available.

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Anyone who saw the collision or has information about the suspect vehicle or driver was urged to contact CHP Oakland at (510) 457-2875.