THE A133 Weeley bypass was closed in both directions following a collision.
The road was closed between Weeley roundabout and Progress Road, Little Clacton.
It is believed that only one vehicle was involved in the crash, which happened at about 9.40am.
A spokesman for the East of England Ambulance Service said: "Our crew treated a woman, who had back pain, at the scene of the collision.
"The patient was then taken to Colchester General Hospital for further treatment.
"Her injuries are not believed to be life-threatening or serious."
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