Essential maintenance work will be taking place over the next four months to replace the joints and waterproofing material at the Mortimer Line Railway Bridge, which passes beneath the M4 near Pingewood, Reading between junction 11 and junction 12.
Overnight carriageway closures between 10pm and 6am are planned for Friday 24 April (eastbound) and Sunday 26 April (westbound)) and Sunday 26 April (eastbound) in preparation for a 24 hour contraflow system which will be installed in late April and early May.
During these closures a clearly signed diversion will be in place via the A33 and A4 Bath Road. Confirmed dates will also be displayed in advance of the closures on black and yellow signs along the M4.
For the safety of the workforce and our customers, the contraflow system with a 50mph speed restriction will remain in place until the end of July 2015. Road users are advised to plan their journeys in advance and allow extra time.
Members of the public should contact the Highways England customer contact centre on 0300 123 5000.
Journalists should contact the Highways England press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.