The southbound 5 Freeway through Santa Fe Springs was open once more after all lanes were temporarily shut down during the Friday morning commute following a big rig fire, according to the California Highway Patrol.
The big rig suddenly caught fire on the freeway just south of Florence Avenue just after 5:30 a.m., the CHP's incident log stated.
The flames from the truck spread to a nearby construction site, CHP Officer Francisco Villalobos said.
Firefighters worked quickly to extinguish the flames from both the vehicle and the site.
A SigAlert was issued at about 6 a.m., and all southbound lanes were closed, according to the incident log.
Motorists were encountering major delays as a result of the closure, with traffic in the area backed up for miles, aerial video showed.
At one point, traffic was being diverted off at the Florence Avenue on-ramp and onto the 605 Freeway, the incident log stated.
Two lanes were reopened just after 9:45 a.m., and all lanes on the roadway were open again around 10:30 a.m., according to CHP.
It was not immediately clear what prompted the big rig to catch fire, but according to Villalobos, the vehicle was not involved in a collision.
No injuries were reported.