The semi-truck blocked nearly every lane of the southbound 5 for several hours after the accident at Alameda Avenue just after 6 a.m.
"It was pretty bad. I was out there for about three hours stuck in traffic," said Ken Sewell of Granada Hills. "I was getting low on gas, so I was getting a little worried."
Sewell said his commute normally takes 40 minutes.
According to the California Highway Patrol, two big rigs collided, causing one to roll over. No one was hurt in the accident.
Traffic was seen backed up for miles because of the lane closures, and cars were seen squeezing by on the shoulder. Authorities were forced to completely shut down the freeway to clear the scene.
Most of the lanes reopened just before 11 a.m. One lane was expected to be closed until at least 1 p.m. as crews cleaned up a fuel spill from the crash.