SAN MARCOS, Calif. - Lanes on eastbound state Route 78 reopened Tuesday after a collision involving an asphalt dump truck and two other vehicles shut down parts of the highway for hours.
The crash happened shortly after 9 p.m. Monday when a 3-axle Peterbilt dump truck finished dumping asphalt for a construction project on eastbound SR-78 west of Nordahl Road.
According to California Highway Patrol, the dump truck driver left the area with the bed still raised. The truck was going at the speed of 60 mph, when the raised bed hit the Nordahl Road overpass, ripping it off and causing damage to both the roadway and the bridge. The massive white block of metal obstructed at least one lane on SR-78.
Two other vehicles were also involved in the crash.
"A vehicle trying to get around the dump truck was struck by another vehicle," said Sgt. Matt Boothe with the CHP.
One driver was arrested on suspicion of driving under the influence and transported to Palomar Medical Center for minor injuries. The other driver was not injured.
Caltrans crews were called to the scene for cleanup and to fix roadway damages. Lanes on SR-78 reopened before 3 a.m.
The collision remains under investigation, according to the CHP.