UPDATE (2:30 p.m.) - The California Highway Patrol issued a SIG Alert for the area shortly after 2 p.m. due to the traffic.
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ORIGINAL STORY: Fire crews were responding to reports of a car fire on the Cuesta Grade Tuesday afternoon.
The fire was reported at around 1:25 p.m. on the northbound side of the highway just north of the summit.
Initial reports into the California Highway Patrol were that one person had gotten out of the vehicle, but the flames had spread to vegetation.
As of 1:40 p.m., one northbound lane was reportedly closed and traffic backing up in the area.

Caltrans
This is a developing story and will be updated as information becomes available.