Two people were taken to hospital following a multi vehicle collision on the A12 at Colchester.
The road was left partially blocked following a collision on the A12 London-bound between J29 for the A120 and J28 near the Colchester United football ground just after 11.30am on Monday.
Congestion on the road was said to be as far back as J30 at Stratford St Mary.
A spokesman for Essex Police said that two people had been taken to hospital following the collision where their injuries were not believed to be serious.
"If you have any information you can submit a report online at www.essex.police.uk or use the 'Live Chat' button to speak to an online operator between 7am-11pm," said a spokesman for Essex Police.
"Please quote incident 418 of July 26.
"You can also call us on 101 or contact Crimestoppers anonymously on 0800 555 111."
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