Map of M40 Motorway Junctions
Which M40 junction do you need? This page lists every one, from Junction 1 at Denham to the M42 at Junction 3A, with the roads it connects to and the places it is signed for.
Search all the latest M40 traffic news
Latest accident or incident on the M40
The most recent accident or incident on the M40 that we are aware of.
Latest active roadworks on the M40
Roadworks live on the M40 right now.
M40 northbound Jct 3 to Jct 4 hard shoulder closure
04:56 (4:56am)10 Nov 2026reported just now
- Location
- M40 northbound between J3 and J4
- Direction
- Northbound
- Lanes closed
- Hard shoulder closed
- Reason
- Tree and vegetation cutting work
- Schedule
- 10:20 (10:20am) Sun 1 Nov 2026 → 23:59 (11:59pm) Wed 11 Nov 2026
Latest planned roadworks on the M40
The next planned roadworks scheduled on the M40.
M40 Southbound, Jct 11 to Jct 10, lane 3 and 2 closure.
04:56 (4:56am)10 Nov 2026reported just now
- Location
- M40 southbound between J11 and J10
- Direction
- Southbound
- Lanes closed
- Lane closures
- Reason
- Maintenance work
- Schedule
- 21:00 (9pm) Mon 9 Nov 2026 → 06:00 (6am) Tue 10 Nov 2026
Forecast - not confirmed
+ 24 more planned roadworks - search all M40 traffic news →
Search all the latest M40 traffic news
Updated 04:57 (4:57am) Tue 10 Nov 2026
Powered by National Highways’ Transport Data Feeds.
The M40, junction by junction
NORTHBOUND ↑ towards Birmingham on the M42
- M42 J3A M42 MOTORWAYEnd of the M40 — Birmingham, Solihull, NEC, the airport, the M1 and M6
- J16 A3400Henley-in-Arden; no northbound exit
- J15 A46, A429Warwick, Stratford-upon-Avon, Coventry, Warwick Parkway
- J14 A452Leamington Spa, Warwick; no northbound exit
- J13 A452, B4100Leamington Spa, Warwick, Gaydon; no southbound exit
- Warwick servicesbetween J12 and J13
- J12 B4451Gaydon, British Motor Museum
- J11 A422, A361Banbury, Brackley, Daventry
- J10 A43Northampton, Milton Keynes, Middleton Stoney
- Cherwell Valley servicesat J10
- J9 A34, A41Newbury, Oxford, Bicester, Aylesbury
- J8A A418Thame, Aylesbury, Oxford
- Oxford servicesat J8A
- J8 A40, A418 spurOxford, Cheltenham, Wheatley; no southbound exit
- J7 A329Thame, Wallingford; no southbound exit
- J6 B4009Watlington, Princes Risborough, Lewknor, Chinnor
- J5 A40Stokenchurch
- J4 A404High Wycombe, Marlow, Maidenhead, Reading, Windsor, the M4
- J3 A40High Wycombe (east), Loudwater; no southbound exit
- J2 A355Beaconsfield, Amersham, Slough
- Beaconsfield servicesat J2
- J1A M25 MOTORWAYM25 Junction 16 — Heathrow, Watford, the M1 and M11
- J1 A40, A412, A4020London, Denham, Uxbridge
SOUTHBOUND ↓ towards London on the A40
JunctionAnother motorwayService area
Warwick services sit between Junctions 12 and 13 and are not reached from a junction.
Things worth knowing about the numbering
- Junction 1A is the M25 interchange. On the M25 it is Junction 16.
- Junction 8A sits just after the motorway turns north at Junction 8, and is the junction for Oxford services.
- The last junction belongs to the M42. The M40 ends at the M42’s Junction 3A, so that is the number you will see.
- The gaps are uneven. Junctions 13 and 14 are close together at Leamington, while the stretch between Junctions 15 and 16 is one of the longest.
- Some exits work one way only. Southbound, towards London, there is no exit at Junctions 3, 7, 8 or 13. Northbound, towards Birmingham, there is no exit at Junctions 14 or 16.
Which stretch page to use
- Junctions 1 to 4: Beaconsfield and High Wycombe
- Junctions 4 to 7: Stokenchurch and the Chilterns
- Junctions 7 to 9: Oxford
- Junctions 9 to 11: Bicester and Banbury
- Junctions 11 to 14: Gaydon and Leamington
- Junctions 14 to 16 and the M42: Warwick to the M42
For motorways beyond each end, see M25 Traffic and M42 Traffic.