The Maeklong Railway (also known as the Mae Klong Railway) is a 1,000 mm (3 ft 3+3⁄8 in) metre gauge railway that runs for nearly 65 kilometres (40 mi) between Wongwian Yai, Bangkok, and Samut Songkhram in central Thailand.^[1]

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Maeklong Railway
A train passes through Talat Rom Hup
Overview
Other name(s)	Mae Klong Railway
Status	Operational
Owner	Government of Thailand
Locale	Central Thailand
Termini	Wongwian Yai Mahachai Ban Laem Maeklong
Connecting lines	Mahachai Line Ban Laem Line
Stations	35
Service
Type	Commuter rail
Services	2
Operator(s)	State Railway of Thailand
Depot(s)	Mahachai
Rolling stock	SRT NKF class
History
Opened	1901
Technical
Line length	66.9 km (41.6 mi)
Number of tracks	1
Track gauge	1,000 mm (3 ft 3+3⁄8 in) metre gauge
Electrification	600 V DC overhead line (1926–1955)
Operating speed	31 km/h (19 mph)
Route map Legend Pak Khlong San Wongwian Yai Talat Phlu Wutthakat Khlong Ton Sai Chom Thong Wat Sai Wat Sing Bang Bon Khan Keha Rang Sakae Rang Pho Sam Yaek Phrom Daen Thung Si Thong Bang Nam Chuet Khok Khwai Ban Khom Khlong Chak Mahachai Tha Chin River Ban Laem Tha Chalom City Hospital Tha Chalom Ban Chi Phakhao Khlong Noklek Bang Sikhot Bang Krachao Ban Bo Bang Thorat Ban Kalong Ban Na Khwang Ban Na Khok Ked Mueang Lad Yai Bang Krabun Maeklong

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The railway became famous for its route through the Maeklong Railway Market, nicknamed (Thai: ตลาดร่มหุบ; RTGS: Talat Rom Hup), meaning the "umbrella pulldown market".^[2] It is one of the largest fresh seafood markets in Thailand, and is centred on the Maeklong Railway's track.^[3] Whenever a train approaches, the awnings and shop fronts are moved back from the rails, to be replaced once the train has passed.^[4]

The line consists of two sections: the eastern Mahachai Line, which runs between Samut Sakhon and Wongwian Yai with 20 stations, and the Ban Laem Line, which runs between Samut Sakhon and Samut Songkhram with 15 stations. The two stretches are separated by the Tha Chin River at Samut Sakhon. The only connection between the stations on the opposite sides of the river is by boat.^[5]

The Mae Klong Railway was built in two separate stages. The Tachin Railway Ltd, founded in 1901 with a concession from the crown of Thailand to construct a line to Samut Sakhon from Bangkok,^[6] built the 33 kilometer Mahachai Line; it opened in 1904 with eight stations. A year later, The Maeklong Railway Company opened the 34 kilometer Ban Laem Line, using three steam locomotives.^[7][5] The lines merged in 1907 to form the Maeklong Railway Ltd. It was originally opened as a goods line, transporting produce from the fishing ports of Samut Sakhon and Samut Songkram to the Bangkok markets.^[3] The Government of Thailand purchased the now-merged company in 1926 and electrified the eastern section, turning it into an interurban tramway.^[8] The Thai military later gained control of the railway in 1942, during World War II, and the line was brought under the control of the State Railway of Thailand in 1952 and fully merged into it by 1955.^[9][5] During this period of merger, the electrification was removed from the eastern section, with steam-hauled and later diesel-hauled trains replacing the old tramcars in 1959.^[7] In 1961 the line's original terminus at Pak Khlong San was closed and replaced with a bus stop, to ease traffic congestion in Bangkok, with Wongwian Yai becoming the new terminus.^[5]

Seventeen trains run daily in each direction between Wongwian Yai and Mahachai.^[10] Four trains run daily between Ban Laem and Maeklong.^[11] The railway is one of the slowest in Thailand, and the average speed for the whole line is only 30 kmph.^[12] There are no signals on the line.^[12]

The Maeklong Railway's first trains were hauled by three 0-4-2T wood-burning tank engines, purchased from Krauss Locomotive Works in 1903 and 1906. Consists of electric tramcars worked passenger services on the eastern section of the line from about 1927 up until the line's de-electrification in 1955, initially being replaced with conventional trains hauled by two Henschel 4-6-2 steam engines. A pair of Henschel 440 hp 2-6-2 diesel locomotives were introduced not long after in 1957, but these were not regarded as a success; the railway did not retire steam traction until 1971, when the older but more reliable Sulzer diesels, among the first used by the SRT, were cascaded down to the Maeklong Railway with the arrival of more modern locomotives on the main network. Since at least 1975, the Maeklong Railway has been operated by relatively modern diesel multiple unit trains.^[7]

• Rail transport in Thailand
• Greater Bangkok commuter rail
• SRT Red Lines
• Molli railway, another narrow-gauge railway notable for street-running