BOYLE HEIGHTS -- A large propane truck that overturned and caught fire on the Golden State (5) freeway Sunday has been uprighted and removed from the East Los Angeles Interchange, where traffic was blocked for several hours.

The truck was carrying about 8,500 gallons of propane fuel when it tipped over on the ramp from the southbound Golden State (5) Freeway to the eastbound Pomona (60) Freeway, officials said.

Fire personnel dispatched at 8:02 a.m. found the truck's cab on fire, and took fewer than 10 minutes to keep it from spreading to the propane cargo and put the blaze out, said Los Angeles city fire spokesperson Brian Humphrey.

In the crash, the tractor trailer flipped onto its passenger side, sliding more 300 feet before it rotated 180 degrees to face oncoming traffic.

"It (also) took a large portion of the guardrail," Humphrey said. A man and a woman who had been inside the cab were found dazed on the side of the freeway, and to Los Angeles County/USC Medical Center with minor injuries.

A SigAlert was issued at 8:09 a.m. closing the transition roads from the southbound Santa Ana (101) to the eastbound Pomona (60) freeways, and the southbound Golden State (5) Freeway to the Santa Ana (5) Freeway.

Firefighters cleared the scene by 11:15 a.m., and the roadway was supposed to be open to traffic by noon, according to California Highway Patrol Officer Patrick Kimball.

There were more than 40 firefighters at the scene, including a heavy rescue unit and hazmat experts, Humphrey said. 

At the peak of congestion, many motorists resorted to driving the wrong way on the affected roads to get around the blockage.