We have received the following information from National Highways:
Important roadworks information
M1 northbound junction 11a to junction 13 – resurfacing and markings work
I am writing to tell you that we plan to carry out road improvements on
the M1 northbound between junctions 11a and 13. Once complete, drivers should benefit from a safer road and more visible markings.
We plan to carry out this work overnight across three weekends in September 2026:
- Saturday 5 and Sunday 6 September
- Saturday 12 and Sunday 13 September
- Saturday 19
We will work between 9pm and 5am only, weather permitting.
Closures and diversions
To carry out the work safely on the three weekends, we will need to close
the M1 northbound between junctions 11a and 13 and divert traffic as follows:
- Traffic on the M1 northbound will leave the motorway at junction 11a.
- At the roundabout, take the second exit onto the A5 Dunstable Northern Bypass.
- Follow the A5 through to Thorn Roundabout.
- At the roundabout, take the second exit for A5 Watling Street.
- Immediately at the next roundabout, take the second exit onto the A505 road.
- Follow the A505 through to Billington Road Roundabout and continue straight onto the second exit for the A4146.
- Follow the A4146 road for some time until reaching Kelly’s Kitchen Roundabout.
- Take the second exit, heading back onto the A5 northbound.
- Take the next exit for Bletcham Roundabout.
- At the roundabout, take the third exit and head onto Bletcham Way towards Browns Wood Roundabout.
- At the roundabout, take the first exit onto Tongwell Street and follow the road to Brinklow Roundabout with Standing Way.
- Take the third exit onto Standing Way, joining the A421 at the second exit on Kingston Roundabout.
- Continue on the A421 until reaching the M1 junction 13.
- Take the appropriate slip road to rejoin the M1 northbound.
Please note emergency vehicles will have access through the works but with caution.
A map of the diversion route has been included below.
To find out more about other major road improvements we’re carrying out across the East of England, please visit our website at www.nationalhighways.co.uk/roads-and-travel/road-projects/east/
If you would like more information, please contact us on 0300 123 5000, or by email at info@nationalhighways.co.uk.