California Highway Patrol issued the following press release:

On Thursday, February 16, 2012, at approximately 0525 hours, fifty-one year old Gary Robles, of Modesto CA, was driving a 2010 International Big Rig, pulling a 2008 Utility trailer, at approximately 55 mph.  Robles was traveling northbound in the northbound #2 lane, just north of Tomkins Hill Road.  Robles allowed his vehicle to drift out of his lane and onto the east shoulder where it struck the parked 1989 Honda Civic.  The Honda was unoccupied at the time of the collision.  The impact caused Robles to lose control of the International as it continued to travel northeast striking the dirt embankment and overturning onto its roof, partially blocking the northbound #2 lane.  Robles was not injured.  Both vehicles received major damage and had to be towed from the collision scene.  Northbound traffic was restricted to one lane, the northbound #1 lane, for several hours while cleanup was being conducted.
 
This traffic collision is still under investigation.  DUI is not suspected to be a factor in this collision.
 
Officer Paul Dahlen
Public Information and Recruitment Officer
Certified Child Passenger Safety Technician

Earlier: One lane of Hwy 101 closed near CR