UPDATE: 9:03 AM
Traffic speeds are increasing.
UPDATE: 8:51 AM
The left lane has reopened.
But, there are still big delays.
Southbound travel time between Route 8 in Trumbull to Route 7 in Norwalk is 84 minutes.
UPDATE: 8:35 AM
DOT said traffic congestion from the accident is nearly five miles.
Left lane remains closed.
Southbound travel time between Route 8 in Trumbull to Route 7 in Norwalk is now 76 minutes.
With traffic or accidents, the travel time is 19 minutes.
A two-vehicle on the southbound Merritt Parkway has closed a lane at the height of the morning rush hour on Thursday.
The accident, reported at 7:57 a.m., has closed the left lane between Exits 44 in Fairfield and 42 in Westport.
The state Department of Transportation reported the average speed in the area is 21 mph.
At 8:11 a.m., travel time between Route 8 in Trumbull to Route 7 in Norwalk is 49 minutes.