The incident involved a semi-truck and a Ford pickup.
Deputies say the Ford was stopped in the middle lane of the southbound freeway for an unknown reason. The pickup's emergency flashers were on.
Investigators say the 18-wheeler slammed into the stopped truck, killing the male driver on impact. The tractor-trailer driver was not hurt.
The crash happened just after 1 a.m. The freeway is now open.
Report a typo to the ABC13 staff