The M4 motorway will be closed eastbound between junction six and five near Datchet tonight for major maintenance work.
The road will be closed from 11pm-5.30am with traffic being diverted along the A4 through Slough.
The westbound stretch between junction five and six will be closed tomorrow overnight from 11pm-5.30am. Traffic will again be diverted along the A4.
Road users are advised to check conditions before setting out and to leave extra time for journeys if they plan to travel while the closure is in place.
This major maintenance scheme will see safety barriers upgraded and extended along the road, and the drainage improved.
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