one of the most extensive bus services in the country, with some of the highest patronage figures in the UK outside of London. There are two major bus operators in Edinburgh: Lothian Buses - the main provider of bus services in the city. McGill's Scotland East Lothian Regional Transport was the precursor to Lothian Buses and was formed in 1986 after bus services were deregulated by the Transport Act 1985. Lothian Regional Transport changed its title to Lothian Buses in 2000. It is a publicly owned company with Edinburgh City Council having the 91% controlling stake in the company; the remainder is divided between the local authorities of Midlothian, East Lothian and West Lothian. Lothian Buses also run the Airport Express shuttle between Edinburgh Airport and the city centre, as well as a network of night buses operating on popular routes between midnight and 5am. Both Lothian Buses and McGill's Scotland East charge a single flat fare regardless of distance, and operate a day ticket system, allowing unlimited travel on their buses during the day. Most buses run at intervals of between 10 and 30 minutes during the day; there is a reduced service after 7pm. There are some night bus services. As well as local buses within the city, several companies offer inter-city buses between Edinburgh and various other cities within Scotland and the UK. Scottish Citylink runs buses from Edinburgh to places such as Stirling, Perth and Glasgow (900 Edinburgh–Glasgow), and Megabus operates budget services between Edinburgh and Glasgow and London. Edinburgh Bus Station is located on St Andrew Square in the city, but is not used by local services. Bus corridors From December 2004 to January 2008, a 1.5 km long guided busway - "Fastlink" - ran between the west Edinburgh suburbs of Stenhouse and South Gyle, parallel to the railway line from Haymarket to South Gyle. There were four passenger halts on the busway at Broomhouse East, Broomhouse West and Saughton East and West. Edinburgh Trams, from the city centre to the Airport, now run on the corridor previously occupied by the Fastlink guideway with stops at Saughton, Bankhead and Edinburgh Park Station. Priority bus lanes on arterial routes into Edinburgh city centre, known as Greenways, because of the distinctive green tarmac used to surface them - were introduced in 1997. Currently the main Greenways into the city are on the following routes: A Traffic Regulation