Denham Roundabout

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Denham Roundabout
Location Map ( geo)
Denham Roundabout - A40 - Geograph - 854328.jpg
Cameraicon.png View gallery (7)
County
Buckinghamshire
Highway Authority
Highways England
Junction Type
Magic Gyratory
Roads Joined
A40, M40, A412, A4020
Junctions related to the A412
Five Points Roundabout • Iver Heath Interchange • King Harry Junction • Maple Cross Interchange • The Dome
Junctions related to the A4020
Ealing Common • Shepherds Bush Green

Denham Roundabout is junction 1 of the M40.

Originally the end of the Western Avenue, when the M40 came, this junction between Uxbridge and Denham was rebuilt with a very big roundabout because the ringways plans planned for a large number of slip roads potentially meeting it. The large radius meant fast circulating speeds, and a high accident rate, so it was turned into a Magic Gyratory.

Routes

Route To Notes

M40

Birmingham, Oxford, Beaconsfield, Heathrow Airport, Watford (M25)

A40

Amersham, Gerrards Cross, Denham, Rickmansworth (A412) Amersham via A413

A40

C. London, Harrow

A412

Slough, Iver Heath

A4020

Uxbridge, New Denham
Denham Court tourist signs to Buckinghamshire Golf Club, Denham Country Park, Colne Valley Park Centre and Groundwork Trust

A40(M)

Oxford, Beaconsfield, High Wycombe

A403

London, Northolt

Northern and
Western Motorway

The NORTH unbuilt early motorway plan.

Denham Spur

The NORTH, Watford, Stansted Airport, (M1, A1(M), M11), Pinner, Bushey (M16)

M25

Aylesbury, Hemel Hempstead (A41(M)), Rickmansworth, Maple Cross possible routing via this junction

M25

(M4, M3, M23), Heathrow Airport, Staines, Gatwick Airport possible routing via this junction



Denham Roundabout
Related Pictures
View gallery (7)
Denham Interchange and Roundabout.pngDenham Roundabout Interchange April 1970 Scheme A.pngDenham Roundabout Interchange April 1970 Scheme B.pngM40 Motorway - eastbound at junction 1 - Geograph - 1792787.jpgM40 Motorway at junction 1 - Geograph - 2358008.jpg
Other nearby junctions
UxbridgeHillingdon Circus • Iver Heath Interchange • Polish War Memorial • Swakeleys Roundabout
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
Junctions on the A40
      Central London - Denham      Bank • St Paul's • Holborn Circus • St Giles Circus • Oxford Circus • Marble Arch • Lancaster Gate • Shepherds Bush Green • Holland Park Roundabout • Marylebone Flyover • Paddington • Westway Roundabout • Wood Lane • Savoy Circus • Gipsy Corner • Hanger Lane • Ealing Common • Perivale • Greenford Roundabout • Target Roundabout • Polish War Memorial • Hillingdon Circus • Swakeleys • Denham Roundabout
           Denham - Wheatley            Denham Roundabout • Pyebush Roundabout • London End Roundabout • Old Beaconsfield Roundabout • Holtspur Temporary Terminal • Holtspur Roundabout • Knaves Beech • Abbey Way Gyratory • Eden Roundabout • Pedestal Roundabout • Stokenchurch • Three Pigeons • Wheatley
  Wheatley - Cheltenham - Ross  Wheatley • Headington Roundabout • Cutteslow Roundabout • Wolvercote Roundabout • Eynsham Roundabout • Asthall Barrow Roundabout • Burford Roundabout • Cox's Meadow • Benhall Roundabout • Arle Court Roundabout • Golden Valley • Elmbridge Court • Over Roundabout • Highnam Corner • Highnam Roundabout • Forest Gate Junction • Weston Cross • Hildersley Roundabout • Over Ross Roundabout
    Ross - Brecon - Carmarthen    Over Ross Roundabout • Wilton Roundabout • Raglan Interchange • Raglan Roundabout • Hardwick Gyratory • Brynich • Tarell • Square and Compass • Llandeilo • Abergwili • Pensarn
       Carmarthen - Fishguard        Pensarn • Llanboidy Road • Blackbridge • Penblewin • Robeston Wathen • Canaston Bridge • Scotchwell • (Salutation Square) • (Bridgend Square) • (Prendergast Roundabout) • Withybush • Rafael • Windyhall