2. Motorway Database
  3. M40
  4. M40 J1 Denham Roundabout

M40 J1 Denham Roundabout

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Route
M40
#
Junction number
1
Markerpost
30
Name
Denham Roundabout
Type
Non-standard interchange
Terminus
Terminus at end of exit list
Other routes
A40, A4020
Authority
Highways England
Restricted turns
Full access
Services
No services

Layout and signage

N/A   A412



A4020


     A40






   Central London
A40
Slough
(A412)
Uxbridge
(A4020)

Lane configuration

LanesLanesLanesLanesLanes

  • Lane 1 exits and returns after the junction.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.

LanesLanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.

Other events

  • Signs Start of motorway regulations
  • Signs End of motorway regulations