The M4 will be closed in both directions during the weekend from 8pm on Friday, November 27, to 6am on Monday, November 30 for extensive resurfacing work.
Traffic will be diverted along the A329M, A3290, A4 and A404M.
The M4 will also be closed in both directions between junctions 10 (Winnersh) and 12 (Theale) from 8pm on Friday, December 4 to 6am on Monday, December 7 for major resurfacing work, gantry installations and road markings.
Traffic will be diverted along the A33, B3270 and A329M.
Drivers using both stretches of the M4 during the following two weekends are advised to plan ahead and allow extra time for their journeys if possible.
More information can be found on the Highways England website (www.highwaysengland.co.uk/traffic),