M40 motorway

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M40 shield

M40
Route information
Part of
Maintained by Highways England
Length89.0 mi (143.2 km)
Existed1967–present
HistoryOpened: 1967
Completed: 1991
Major junctions
Southeast endDenham
 
Northwest endTanworth in Arden
Location
CountiesBuckinghamshire, Oxfordshire, Northamptonshire, Warwickshire
Primary
destinations
Road network
M32M42

The M40 motorway is a motorway between Denham, near London and Solihull near Birmingham in the United Kingdom. It was built in stages between 1967 and 1991 and is 89 miles (143 km) long.

Junctions[change | change source]

M40 motorway
mile km Southbound exits (B carriageway) Junction Northbound exits (A carriageway) Coordinates
18.1 29.2 End of motorway
Road continues as A40 to London
J1
Start of motorway
Road formed from main carriageways of A40 from London
51°33′41″N 0°29′45″W / 51.561305°N 0.495887°W / 51.561305; -0.495887 (M40, J1)
Slough A412
Uxbridge A4020
Non motorway traffic
19.9
20.4
32.0
32.9
Watford (M1) Heathrow Airport (M4) (M3, M23, M11) M25 J1a Watford &(M1) Stansted Airport (M11) Heathrow Airport (M4)
Gatwick Airport (M23) M25
51°33′39″N 0°31′53″W / 51.560798°N 0.531335°W / 51.560798; -0.531335 (M40, J1A)
24.8
25.3
39.9
40.7
Beaconsfield, Amersham, Slough A355, Beaconsfield services Extra J2
Services
Beaconsfield, Amersham, Slough A355, Beaconsfield services Extra 51°35′39″N 0°37′39″W / 51.594295°N 0.627637°W / 51.594295; -0.627637 (M40, J2)
27.8
28.1
44.7
45.2
No access J3 Loudwater and High Wycombe (East) A40 51°36′12″N 0°41′30″W / 51.603359°N 0.691710°W / 51.603359; -0.691710 (M40, J3)
31.3
31.6
50.3
50.9
High Wycombe, Marlow, Maidenhead A404 (M4) J4 High Wycombe, Marlow A404 (M4) 51°36′44″N 0°46′07″W / 51.612261°N 0.768485°W / 51.612261; -0.768485 (M40, J4)
38.9
39.3
62.6
63.2
High Wycombe (West), Stokenchurch A40 J5 Stokenchurch A40 51°39′38″N 0°54′46″W / 51.660524°N 0.912895°W / 51.660524; -0.912895 (M40, J5)
41.4
41.8
66.7
67.2
Watlington, Princes Risborough B4009 J6 Thame, Watlington, Princes Risborough B4009 51°40′20″N 0°57′38″W / 51.672236°N 0.96066°W / 51.672236; -0.96066 (M40, J6)
47.0
75.6
75.6
76.2
No access J7 Thame, Wallingford, A329 51°43′28″N 1°03′27″W / 51.724583°N 1.057477°W / 51.724583; -1.057477 (M40, J7)
48.0
48.4
77.3
77.9
No access J8 Oxford, Cheltenham A40 51°43′56″N 1°04′37″W / 51.732291°N 1.076832°W / 51.732291; -1.076832 (M40, J8)
49.0
49.2
78.9
79.2
Thame, Aylesbury A418
Oxford (A40), Oxford services Welcome Break
J8a
Services
Thame, Aylesbury A418
Oxford (A40), Oxford services Welcome Break
51°44′24″N 1°05′44″W / 51.740052°N 1.095457°W / 51.740052; -1.095457 (M40, J8a)
60.3
60.6
97.1
97.6
Bicester, Aylesbury A41
Oxford, Newbury A34, Blenheim Palace
J9 Bicester A41
Oxford, Newbury A34, Blenheim Palace
51°52′08″N 1°11′54″W / 51.868754°N 1.198454°W / 51.868754; -1.198454 (M40, J9)
65.9
66.2
106.0
106.6
Northampton A43 (M1)
B430, Cherwell Valley services Moto, Silverstone
J10
Services
Northampton A43 (M1)
B430, Cherwell Valley servicesMoto, Silverstone
51°56′59″N 1°12′22″W / 51.949635°N 1.206093°W / 51.949635; -1.206093 (M40, J10)
76.2
76.7
122.7
123.4
Banbury A422
Daventry A361, Paulerspury, Towcester
J11 Banbury A422
Chipping Norton A361, Paulerspury, Towcester
52°04′22″N 1°18′48″W / 52.072675°N 1.313295°W / 52.072675; -1.313295 (M40, J11)
86.8
87.0
139.7
140.0
Gaydon B4451 J12 Gaydon B4451 52°11′32″N 1°27′29″W / 52.192219°N 1.458135°W / 52.192219; -1.458135 (M40, J12)
89.8 144.5 Warwick Services Welcome Break Services Warwick Services Welcome Break 52°13′05″N 1°30′15″W / 52.218125°N 1.504269°W / 52.218125; -1.504269 (M40, Warwick Services)
92.1
92.3
148.2
148.6
No access J13 Leamington, Warwick, Warwick Castle A452
B4100
52°14′26″N 1°33′13″W / 52.240678°N 1.553578°W / 52.240678; -1.553578 (M40, J13)
93.9
94.2
151.1
151.6
Leamington A452 J14 No access 52°15′25″N 1°35′18″W / 52.256863°N 1.588211°W / 52.256863; -1.588211 (M40, J14)
95.0
95.3
152.9
153.4
Warwick, Warwick Castle A429
Stratford, William Shakespeare Coventry A46 Leicester (M69)
J15 Warwick A429
Stratford, Coventry A46 Leicester (M69)
52°15′36″N 1°36′48″W / 52.260068°N 1.613359°W / 52.260068; -1.613359 (M40, J15)
103.8
104.1
167.1
167.6
Henley-in-Arden A3400 J16 No access 52°20′06″N 1°46′28″W / 52.335129°N 1.774549°W / 52.335129; -1.774549 (M40, J16)
105.7
106.0
170.1
170.6
Start of motorway
Motorway is formed by two sliproads from the M42
J17
(M42, J3a)
End of motorway
Road continues as M42
The SOUTH WEST, Birmingham (South & West), Redditch & M5
The North, Birmingham (North, East) (M1, M6)
52°20′51″N 1°49′09″W / 52.347367°N 1.819139°W / 52.347367; -1.819139 (M40, End of motorway)


Data[1] from driver location signs are used to provide distance and carriageway identifier information. Where a junction goes across several hundred metres, both start and end locations are given.


KML is from Wikidata


  1. "Traffic England Live Traffic Condition Map (selected Popups)". Highways Agency. Archived from the original on 10 February 2012. Retrieved 11 November 2009.