Fire fighters made quick progress on a brush fire on the Southbound Interstate 5 north of Castaic Monday evening.
According to dispatch supervisor Miguel Ornelas a vehicle fire was reported around 7:38 p.m.
According to the supervisor, when units arrived on scene there was a fully involved big rig that spread to the brush.
The fire was held to a quarter acre.
There were no injuries and the fire was knocked down at 8:04 p.m.