A Modesto man was killed Monday night when he was hit by a vehicle at the Keyes Road on-ramp on Highway 99.

The name of the deceased is not being released pending next of kin notification. The California Highway Patrol stated the man was 57 years old.

The collision happened around 9:15 p.m. Monday.

Matthew Higle, 34, of Ceres was driving a 2009 Nissan sedan on the Keyes Road on-ramp and was just entering Highway 99 when the front of his vehicle collided with an unknown object.

Higle drove to the side of the highway and immediately called 911, according to the CHP.

Emergency personnel responded to the scene and made the discovery that the unknown object Higle had hit was a pedestrian.

The 57-year-old man was pronounced deceased at the scene.

Higle was not injured in the collision.

The collision remains under investigation. The CHP said Higle was not under the influence of drugs or alcohol at the time of the collision, but will have to wait for the toxicology results on the deceased to see if either played a factor.