London's transport forms the hub of the road, rail and air networks in the United Kingdom. It has its own dense and extensive internal private and public transport networks, as well as providing a focal point for the national road and railway networks. London also has a number of international airports including one of the world's busiest, Heathrow and a seaport.
London's internal transport system is one of the Mayor of London's four policy areas, administered by its executive agency Transport for London (TfL). TfL controls the majority of public transport in the area, including the Underground, London Buses, Tramlink, the Docklands Light Railway, and London Overground rail services within Greater London; other rail services are franchised to train operating companies by the national Department for Transport (DfT). TfL also controls most major roads in the area, but not minor roads (see below).
In May 2010, the Mayor issued his transport strategy, which he described it as being "a key part of a strategic policy framework to support and shape London's social and economic development". That framework also includes the London Plan, the Mayor's spatial planning strategy.