A trailer fire early Thursday briefly closed all the westbound lanes of I-44 just south of where it intersects with I-244 in west Tulsa.
Sapulpa firefighters put the 5 a.m. fire out and the Oklahoma Highway Patrol reopened all but one westbound lane.
Troopers say the semi was headed west when the driver said the trailer's brakes locked up sparking a fire. The driver stopped at 49th West Avenue, parked the trailer on the side of the highway and moved his cab onto Southwest Boulevard.
The driver and a passenger were not hurt.
The OHP says because of the fire, westbound traffic on I-44 backed up for miles. Troopers finally reopened the outside westbound lane at 8:40 a.m.