section_path: Infrastructure/Transportation
section_name: Transportation
paragraph_text: Transportation
  
  The State Railway of Thailand (SRT) operates all of Thailand's national rail lines. Krung Thep Aphiwat Central Terminal and Bangkok (Hua Lamphong) are the main termini of intercity routes. Phahonyothin and ICD Lat Krabang are the main freight terminals. As of 2024 SRT had 4,507 km (2,801 mi) of track, all of it meter gauge. Nearly all is single-track (2,847.1 km), although some important sections around Bangkok are double (1,089.9 km or 677.2 mi) or triple-tracked (107 km or 66 mi) and there are plans to extend this. Rail transport in Bangkok includes long-distance services, and some daily commuter trains running from and to the outskirts of the city during the rush hour, but passenger numbers have remained low. There are also four rapid transit rail systems in the capital: the BTS Skytrain, MRT, SRT Red Lines and the Airport Rail Link.
  
  Thailand has 390,000 kilometres (240,000 miles) of highways. As of 2017, Thailand has over 462,133 roads and 37 million registered vehicles, 20 million of them motorbikes. A number of undivided two-lane highways have been converted into divided four-lane highways. Within the Bangkok Metropolitan Region, there are a number of controlled-access highways. There are 4,125 public vans operating on 114 routes from Bangkok alone. Other forms of road transport includes tuk-tuks, taxis — with over 80,647 registered taxis nationwide as of 2018, vans (minibus), motorbike taxis and songthaews.
  
  As of 2012, Thailand has 103 airports with 63 paved runways, in addition to 6 heliports. The busiest airport in the country is Bangkok's Suvarnabhumi Airport.
  
  In Bangkok, there were two failed rapid rail projects Lavalin Skytrain and Bangkok Elevated Road and Train System, before Mass Rapid Transit Master Plan in Bangkok Metropolitan Region was endorsed by the cabinet on 27 September 1994 and implemented from 1995 to the present.