The M48 bridge will operate as usual.
At 8pm on Friday the Prince of Wales Bridge will be fully closed westbound and drivers will be diverted via the M48 bridge.
Saturday 15 and Sunday 16 December
This same pattern will continue over the weekend with the bridge running with three lanes at the toll plaza closed from 6am to 8pm on Saturday and 6am to 7pm on Sunday, and all other westbound lanes open as usual.
Overnight the bridge will be fully closed westbound and drivers will be diverted via the M48 bridge.
Monday 17 December
On Monday 17 December, the Prince of Wales Bridge will reopen with three free flowing lanes. These will be narrow lanes with a 50mph speed limit to ensure the safety of drivers.
Shortly after the Prince of Wales Bridge reopens on 17 December, the M48 bridge will be fully closed westbound, reopening on the morning of 19 December with two free flowing lanes. These will be narrow lanes with a 50mph speed limit for the safety of drivers.
Further work will be carried out in 2019 to return both routes to a three-lane motorway with the usual 70mph speed limit.
Hannah Milliner, General Manager Severn Bridges, Highways England, said: “This is a significant piece of work which is far more complex than simply removing toll booths. We want to make sure that journeys can be completed safely and free of charge by the end of the year and will then focus on the next stage of work.”
Other changes taking place include the closure of the M4 Rogiet Tag office. Information for Tag holders has been provided directly to account holders.
Drivers can find more information about these changes from the Severn Bridges website at www.severnbridge.co.uk.