The westbound carriageway of the A14 in west Suffolk was closed after a car caught fire.
Emergency services were called at 10.30am today to reports of a car on fire on the westbound carriageway at junction 37, outside Newmarket.
According to Suffolk Fire and Rescue Service and Cambridgeshire police, the road has been closed while the incident is dealt with.
There are no reported injuries to anyone involved.
The AA traffic map was showing queues are forming in the area.
National Highways said on Twitter the incident caused tailbacks of about eight miles on the westbound carriageway.
A later tweet revealed that the road will need to be resurfaced in lane one after damaged caused by the vehicle fire.
Drivers were advised to allow an extra 30 minutes for their journey.
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