National Highways are carrying out essential maintenance work they are carrying out on the A11 between Babraham and Six Mile Bottom.  Their work will include resurfacing, barrier replacement, and sign renewal and will ensure that the A11 remains safe and serviceable for years to come.

Work began on Monday 6 March, and we plan to complete it by February 2024.

Closures and diversions

To carry out the work safely, we need to close parts of the A11, one direction at a time.

We will be starting the next phase of our work on Thursday 11 May on the A11 northbound from Fourwentways to Six Mile Bottom, finishing on Wednesday 16 August. There will be overnight closures on weeknights only from 8pm to 6am.

While the A11 is closed, a strategic diversion will be in place, via the M11 and A14. Local traffic will be diverted as follows:

  • Traffic wishing to join the A11 northbound from the Wilbrahams, will be diverted north on Little Wilbraham Road and west on A1303 before joining the A14 east at junction 35 (Stow cum Quy) until it merges with the A11 north. (Diagram 1)
  • Traffic wishing to continue north on the A11 from Fourwentways will be directed to take the first exit onto A1307 / Cambridge Road then right onto Newmarket Road, travelling south towards Granta Park Roundabout. Exit roundabout onto A505 westbound towards Duxford and join the M11 at junction 10 to continue north. (Diagram 2)
  • Traffic wishing to join the A11 northbound at Balsham Road will be diverted northwest towards Cambridge on Balsham Road through Fulbourn, then turn left to head south on Limekin Road and then left again to return southeast on A1307 Babraham Road. Drivers will then follow the route detailed above to take the A505 westbound to join the M11 at junction 10 to continue north. (Diagram 3)

Further information about road closures and diversion routes can be found on our website at

 How to find out more

To find out more about road improvements we’re carrying out across the East of England, please visit their website at

If you would like more information, please call 0300 123 5000, or by email at