The A47 was blocked due to a car catching fire near Bawburgh.
The car blaze started at about 6.20pm.
The A47 Westbound between B1108 Watton Road and Longwater turn-off was then blocked.
Norfolk Fire Service crews from Earlham and Carrow attended the scene and used hose reel jets to extinguish the fire, which was brought under control by 6.42pm.
There was a heavy build-up of traffic along the A47 between Bawburgh and Little Melton.
Bus services were disrupted due to the incident.
Konectbus said delays to travel were likely and that buses were diverting via Dereham Road and Easton.
For up-to-date information about the county's roads, visit our LIVE Norfolk traffic map.
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