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Gaydon Interchange

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M40 Junction 12
Location Map ( geo)
Southbound M40, Junction 12 (for Gaydon) - Geograph - 3526785.jpg
Cameraicon.png View gallery (2)
Highway Authority
Highways England
Junction Type
Folded diamond
Roads Joined
M40, B4451

Junction 12 of the M40 serves Gaydon.

The junction was originally planned in the 1970s to a design almost identical of that when it opened in 1991. The only difference being the northern side of the junction where the priority favours movements between the B4451 and the southbound M40. This was changed so the B4451 ran uninterrupted in the final design.

In 2016 the junction was altered to increase capacity. The slip road serving the southbound M40 was lengthened and traffic signals were provided at the end of both slip roads. The bridge over the M40 was remarked as S2+1 and this necessitated narrowing the pavements on both sides.

Original proposal


Route To Notes


Birmingham (M42)


London, Banbury


Bishop's Itchington


Gaydon, Kineton, Jaguar, Land Rover


  • The M40 Motorway (Junction 12 Improvements) Scheme 2014 - This Scheme gives special road and trunk road status to two new slip roads, each about 0.3 kilometres in length, to be provided from the existing southbound carriageway of the M40 motorway to the signal controlled junction which the Secretary of State proposes to construct at the intersection with the B4451 (Gaydon Road).

Gaydon Interchange
Related Pictures
View gallery (2)
Southbound M40, Junction 12 (for Gaydon) - Geograph - 3526785.jpgGaydon Interchange original plan.png
Junctions on the M40
Denham Roundabout • 1A Denham Interchange • 2 Beaconsfield • 3 Knave's Beech • 3A Junction 3A • 4 Handy Cross • 5 Stokenchurch • 6 Lewknor  • 7 Three Pigeons • 8 & 8A Wheatley • 9 Wendlebury  • 10 Ardley • 11 Junction 11 • 12 Junction 12 • 13 Junction 13 • 14 Barford • 15 Longbridge • 16 Junction 16 •  M42 (3A) Umberslade
Proposed extension to M5: M42 3 Portway Island • M42 2 Hopwood Park • M42 1 Harvester Island • M5 4A Catshill • M5 4 Lydiate Ash

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