The B1026 Goldhanger Road is currently blocked in both directions due to a collision between B1022 Colchester Road and Cedar Chase.
Traffic is moving slowly in the area as emergency services deal with the incident.
Motorists are advised to avoid the route and seek alternative roads where possible.
The crash is causing delays for drivers travelling through Heybridge and the surrounding Maldon area.
No details have yet been released about the vehicles involved or potential injuries.
Emergency services are working to clear the scene and reopen the road as quickly as possible.
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