A major crash on the A12 in north Essex closed the road for several hours and saw smoke fill the carriageway.
Emergency services were called to the incident on the A12 northbound near Colchester at about 7pm on Thursday.
Traffic was at a standstill from the B1024 London Road at Kelvedon North to the J25 A120 at Marks Tey.
National Highways estimated it caused three miles of congestion northbound and two-and-a-half miles of queues southbound.
Essex Police said the drivers involved in the collision were not injured.
One lane of the northbound carriageway opened at 9.30pm, with a full reopening at 10.30pm.
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