A biker was left with serious injuries in a crash on the M11.
Police were called to junction 6 for the M25 just before 6.20pm on Monday 23 August.
It was reported that a motorbike and a grey VW Touran had been involved in the incident.
The motorbike rider was taken to hospital with serious injuries.
An Essex Police spokesman said: "Anyone who witnessed the collision, has dash cam footage, or has information on it should submit a report online at https://www.essex.police.uk or use the 'Live Chat' button to speak to an online operator between 7am-11pm.
"You can also call us on 101 and cite incident 996 of Monday 23 August.
"Information can also be given to independent charity Crimestoppers anonymously on 0800 555 111 or https://crimestoppers-uk.org."
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