Two lanes are currently closed and there are six miles of tailbacks on the A14 in west Suffolk as emergency services attend a lorry fire.
Lanes one and two are closed westbound near junction 37 at Newmarket as fire crews tackle the blaze on a lorry trailer carrying scrap metal.
According to a Suffolk Fire and Rescue Service spokesman, the lorry cab has detached from the trailer.
Police are also in attendance to assist with traffic management.
A spokesperson also added that there are no casualties.
National Highways said on Twitter the incident has caused six miles of tailbacks on the A14 and added about 45 minutes to journey times.
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