A car burst into flames on the Northern Distributor Road (NDR).
Firefighters were called to the blaze at 8.15pm on Sunday evening.
The fire broke out on a section of the NDR near to the A47 slip road in Postwick.
Crews from Carrow and Sprowston were sent to the scene, and used breathing apparatus and hose reel jets to extinguish the fire.
Norfolk fire service said the road was blocked initially while smoke was travelling up the highway.
Police were also on the scene.
The ambulance service were not called and nobody was injured.
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