M4/Airport Spur
M4 | |||||||||||||
Location Map ( geo) | |||||||||||||
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From: | West Drayton (TQ073787) | ||||||||||||
To: | Heathrow Airport (TQ074770) | ||||||||||||
Distance: | 1.1 miles (1.8 km) | ||||||||||||
Meets: | M4, A4, A408, Heathrow Tunnel | ||||||||||||
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Route outline (key) | |||||||||||||
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Junction List | |||||||||||||
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The M4 Airport Spur links the M4 to the central area of Heathrow Airport. It is unusual as it heads away from the M4 in two directions. When motorway numbers were being planned, the spur (being more than a mile long) was given its own number in several schemes (M44 and M30 being the main choices), however it was constructed and opened as a spur of the M4. Driver Location Signs give chainages prefixed with AS and then a figure in hectometres (tenths of kilometres), rather than the standard kilometres.tenths format.
The spur is often quoted as being the first motorway in the UK to gain a bus lane. However, this is incorrect as the then-M63 had bus lanes from its construction in the 1970s within Princess Parkway Interchange, though not on the motorway mainline. The M4 Airport Spur's bus lane is still older than the more famous bus lane on the M4 motorway mainline. It was provided to accompany the opening of the temporary Heathrow Junction railway station in 1998.
Links
legislation.gov.uk