The A12 from Ipswich to Colchester has been reopened after a crash involving three lorries.
The incident happened on the southbound carriageway at junction 27, near West Bergholt, on Wednesday morning.
National Highways said on Twitter the crash caused five miles of tailbacks on the A12, with drivers queuing as far back as Langham.
The AA traffic map said the incident caused significant delays in the area.
Essex Travel News said on Twitter the crash involved three lorries, while an air ambulance has been pictured at the scene.
However, according to Essex police, no injuries were reported but one person was reported for careless driving.
National Highways later said the road was closed in both directions due to the crash, but has since reopened.
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