A man was flown to hospital after suffering injuries in a “serious” crash on the A12 at Marks Tey.
Essex Police earlier advised motorists to avoid the area while emergency services dealt with the incident, which was reported at around 7.25pm yesterday.
The East Anglian Air Ambulance landed at the scene to help paramedics.
A man was treated and airlifted to Ipswich Hospital with a head and suspected back injury.
The incident was described as “serious” by roads policing officer Sgt Colin Shead.
He said the incident involved a Royal Mail van and a motorcyclist on the northbound carriageway opposite Doggetts Lane services.
An East of England Ambulance Service Trust spokesman said: “The East of England Ambulance Service Trust was called to a road traffic collision at 7.24pm on the A12 near Marks Tey.
“Two ambulances, the Hazardous Area Responses Team (HART), the East Anglian Air Ambulance and three rapid response vehicles attended and treated a man.
“He was flown to Ipswich Hospital with a head and suspected back injury.”
Traffic was also reported to be slow on the southbound carriageway as drivers slowed to look at the scene.
The road remained open London-bound during the incident.
If anyone was driving in the area at the time of the incident and has dash cam footage, call police on 101.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here