One lane of the A12 is closed following a crash.
The two vehicles collided at Junction 22 (Witham North) on the London-bound carriageway just before 8am.
An East of England Ambulance Service spokesman said: "We were called at 7.50am and sent an ambulance and a rapid response vehicle to the scene.
"We had reports of one patient, a woman believed to be in her 20s, who had back pain.
"She was assessed at the scene and did not require hospital treatment."
The incident has now cleared, but traffic is queing back to Junction 25 (Marks Tey).
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