A312 | ||||
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![]() View of the A312 road ('The Parkway') in Hayes | ||||
Route information | ||||
Length | 13.5 mi (21.7 km) | |||
Major junctions | ||||
North end | Harrow | |||
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South end | Hampton | |||
Location | ||||
Country | United Kingdom | |||
Primary destinations | Heathrow Airport | |||
Road network | ||||
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The A312 is an A road in England, running across west London from Hampton to Harrow. Its status varies from a local urban street to a major dual carriageway in Hayes. Part the road has been diverted to make way for Heathrow Airport, while another stretch was originally planned to be Ringway 3, one of four major ring motorways around London.