M1 planned maintenance
We regularly maintain the M1 between junctions 9 and 14 each month on pre-planned dates.
Latest updates
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13 August 2025
Planned road closures in August
We need these overnight (10pm - 5am) for maintenance this month:
Wednesday 13 August - M1 northbound junctions 9 to 11a
M1 northbound junctions 9 to 11a diversion
- leave the M1 northbound at junction 9 and follow the A5183
- then take the A505 to the A5
- rejoin the M1 at junction 11a
If you want to join the M1 northbound at junction 10:
- you'll be diverted southbound to junction 9
- from junction 9 follow the northbound diversion.
If you want to join the M1 northbound at junction 11:
- you'll be diverted by the A505 to join the A5
- then rejoin the M1 at junction 11a.
M1 northbound junctions 9 to 11a diversion map.
Thursday 14 August - M1 northbound between junctions 11a to 14
M1 northbound between junctions 11a to 14 diversion
- you'll be diverted by the A5, then the A505
- then continue on the A4146 to the A5, V6 and A4146
- rejoin the M1 at junction 14
If you want to join the M1 at junction 13, you'll be diverted by the A421 to join the northbound diversion.
Friday 15 August - M1 southbound between junctions 14 to 11a
Map for M1 north and southbound diversions between junctions 14 and 11a.
Saturday 16 August – M1 southbound between junctions J11a-J9
M1 southbound between junctions J11a-J9 diversions
- leave the M1 southbound at junction 11a and follow the A5
- continue and join the A505 to the A5183
- rejoin the M1 junction at 9.
If you want to join the M1 southbound at junction 10:
- you'll be diverted northbound to junction 11
- then join the A505 to the A5183
- rejoin the M1 at junction 9 southbound.
M1 southbound between junctions 11a and 9 diversion map.
Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England site. Our travel alerts give details of live incidents on our network.
Project information
Overview
The M1 is a key strategic road, carrying high volumes of heavy goods and other vehicles between London and the North. Many people rely on it very day for work and leisure.
Benefits
Rather than wait for faults to appear, we plan regular maintenance overnight on specific dates. This helps us keep the road in good condition with less impact on drivers.
Works include:
- technology repairs
- drainage work
- sweeping grass cuttings
- surface repairs
- cleaning signs
Documents
Traffic information
Information about scheduled roadworks and events on our motorways and major roads.Sign up for updates!
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