|Location Map ( geo)|
|A taffic jam just before the junction.|
|M4, M4 Airport Spur|
Heathrow Interchange (also known as Sipson Interchage) is junction 4 of the M4.
The roundabout under the M4 mainline is under motorway regulations. In the late 1990s proposals existed for a direct link to the M4 southbound spur in order to relieve traffic congestion at the junction.
|The WEST, Gatwick Airport, Heathrow Airport (Terminal 5)|
|Central London, Hammersmith, Hayes, Heathrow Airport (Terminal 4 & Cargo)|
|Uxbridge (A408)||spur to Cherry Lane Roundabout|
|Heathrow Airport (Terminals 1, 2 & 3)||spur to Concord Roundabout (junction 4A)|