A LEAKING water main has closed one lane of Eastern Avenue in each direction.
The closures leave one lane of traffic open from the junction with Fossetts Way, to Garon Park roundabout.
A statement on Essex and Suffolk Water's website at 7.40am said they were aware of the problem, which caused partial flooding of the road.
The water company said: "A repair team are on site for further investigations, we apologise for any disruption this may cause.
"There is a leaking 18-inch water main, we are working to reopen the road as soon as possible."
If the leak cannot be fixed before 3.30pm, the road will be fully reopened and then partially closed again at 8pm, for work to be finished.