Traffic was backed up on Interstate Five Thursday due to a pickup catching fire, which also sparked a small vegetation fire. The call came in just after 11AM for a pickup on fire on Northbound I-5 about a mile south of Knighton Road. Arriving firefighters said the white Dodge pickup was fully engulfed when they arrived. Two occupants were able to escape the vehicle. With one lane closed, traffic was diverted onto the center divider to get past the scene until all lanes were reopened around Noon.