The A12 will have closures and lane restrictions between 22:00 and 06:00 on the following dates while works are carried out to improve step-free access at Leyton station.
From Monday 31 March until Wednesday 2 April, the A12 will be closed westbound between the Green Man interchange roundabout and Eastway junction.
From Wednesday 2 until Sunday 6 April, the A12 will be restricted to one lane westbound for 1km west of the Green Man interchange roundabout.
(taken from the TfL Website)