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Route information and related roads
Road details
About the M40
Approximate length89 miles
RouteLondon – Birmingham
Southeastern endDenham, A40
Northwestern endTanworth-in-Arden, M42
Major areasHigh Wycombe, Oxford, Banbury, Warwick, Birmingham
Key connectionsA40, M25, A404, M42
Connecting roads
M40 planned closures and diversions
M40 services
Motorway services guide →Selected service areas from operator listings. Check the operator for current facilities, access and opening times.
How busy is the M40?
2025 annual average136,403vehicles a day
J2 to J1A · Buckinghamshire
8,242 HGVs a day · 6.0% of traffic
Busiest published count location · both directionsM40 route and junction details
Selected junctions and connections. Check signs for permitted movements and current access.
- Connects A40, A412, A4020
Handy Cross Interchange
- Connects A404
M42 CONNECTION (M42 J3A)
- Connects M42
M40 traffic questions
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Where can I find M40 services?
The services section above lists service areas on the M40.
Where are the delays on the M40?
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