The M1 between junctions 14 to 15 northbound will be closed for 56 hours from 10pm on Friday 22 October to 6am on Monday 25 October.
National Highways said:
‘The closure is in place while the motorway surface is lowered at Tongwell Lane Farm bridge and Little Linford Lane over bridge.
‘This work is necessary because the bridge is currently too low for tall traffic such as lorries once this section of the M1 becomes a four-lane motorway.
‘This is a significant piece of work so unfortunately we have to close the road fully to undertake it safely. Diversion routes will be clearly signed for the duration of this closure.
‘If we are able to complete the work quicker than expected, we will re-open the road and will advise motorists and the public through social media and the electronic signs on the motorway itself.
‘Please note that these are provisional dates and are subject to change, as there may be conditions outside of our control, such as adverse weather, and road incidents.’