Traffic is moving slowly after an accident near Marks Tey.
The crash, involving a car and a motorbike happened between junction 26 at Eight Ash Green and junction 25 at Marks Tey at around 8.20am today.
The road has been partially blocked for the last hour.
Traffic is currently queuing all the way back to Ardleigh Crown Interchange at junction 29 on the road moving Londonbound.
Essex Travel tweeted traffic has been moving slow throughout rush hour due to the crash.
Colchester – Slow moving traffic in and around Colchester town not helped by accident on the A12 Londonbound pic.twitter.com/8wp61UtCGs
— Essex Travel News (@Essex_Travel) March 6, 2019
The blockage on the road has since been cleared and traffic is now moving at a steady pace.
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