By CBS13 Staff

TUOLUMNE COUNTY (CBS13) — A Copperopolis man has died after a crash on Highway 120 east of Knights Ferry early Sunday morning.

California Highway Patrols says, around 2:30 a.m., 57-year-old William Reeves was heading eastbound on the highway near Green Springs Road when – for an unknown reason – he went onto the shoulder at a high speed.

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Reeve’s vehicle then continued on the dirt center median before he clipped a paddle marker.

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The car then went out of control until it finally crashed into an asphalt curb on the south shoulder – causing Reeve’s vehicle to overturn into the grass.

Officers say Reeves died at the scene. He was not wearing a seatbelt, CHP says.

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Neither drugs nor alcohol were factors in the crash, CHP says.