Police are appealing for witnesses to come forward after a collision on the A127 earlier this week involving a motorbike and a van on the London-bound slip at Dunton.
It occurred at around 1pm on Wednesday June 23.
The rider of the motorbike, a man in his 30s, sustained serious injuries.
Anyone who witnessed the collision, or has dash cam footage available is urged to submit information through the police website, use the ‘Live Chat’ function or call 101.
The incident number to quote is 630 of 23 June.
Alternatively, if you would prefer to remain anonymous you can call Crimestoppers on 0800 555 111.