A big rig caught fire and then engulfed a construction vehicle it was carrying on San Ramon Valley Boulevard near Lucky's on Thursday afternoon, according the San Ramon Valley Fire Protection District.
Firefighters were alerted to the blaze at 3:54 p.m. and it was extinguished by 4:07 p.m.
The fire was thought to have started on the tire of a big rig and then spread to the construction vehicle on board, fire district spokesman Kimberly French said.
Nobody was hurt in the fire.
The cause of the fire was not immediately known.