Phahonyothin Road ( th, ถนนพหลโยธิน, , ) or Highway 1 is a main road in
Bangkok
Bangkok, officially known in Thai as Krung Thep Maha Nakhon and colloquially as Krung Thep, is the capital and most populous city of Thailand. The city occupies in the Chao Phraya River delta in central Thailand and has an estimated populatio ...
and one of the four primary highways in
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...
, which include
Mittraphap Road
Mittraphap Road (, , ) or Highway 2 (, ) is one of the four primary highways in Thailand, along with Phahonyothin Road (Highway 1), Sukhumvit Road (Highway 3), and Phetkasem Road (Highway 4). It runs from Saraburi to Nong Khai.
The road was origi ...
(Highway 2),
Sukhumvit Road
Sukhumvit Road ( th, ถนนสุขุมวิท, , ), or Highway 3 ( th, ทางหลวงแผ่นดินหมายเลข 3), is a major road in Thailand, and a major surface road of Bangkok and other cities. It follows ...
(Highway 3), and
Phet Kasem Road
Phet Kasem Road (, , )ราชบัณฑิตยสถาน. ''อ่านอย่างไร และ เขียนอย่างไร ฉบับราชบัณฑิตยสถาน.'' พิมพ์ครั้งที่ ...
(Highway 4). It begins at
Victory Monument in
Bangkok
Bangkok, officially known in Thai as Krung Thep Maha Nakhon and colloquially as Krung Thep, is the capital and most populous city of Thailand. The city occupies in the Chao Phraya River delta in central Thailand and has an estimated populatio ...
and runs
north
North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography.
Etymology
The word ''no ...
to the
Burmese border, with a total length of .
History
left, Phahonyothin Road passing 11th Infantry Regiment station

Phahonyothin Road was originally called "Prachathipat Road" ( th, ถนนประชาธิปัตย์, ''Thanon Prachathipat'', literally "Democratic Road"), and reached just to
Don Mueang. In 1938, Field Marshal
Plaek Phibunsongkhram
Field Marshal Plaek Phibunsongkhram ( th, แปลก พิบูลสงคราม ; alternatively transcribed as ''Pibulsongkram'' or ''Pibulsonggram''; 14 July 1897 – 11 June 1964), locally known as Marshal P. ( th, จอมพล � ...
had the road extended from Don Mueang, through
Bang Pa-In
Bang Pa-in ( th, บางปะอิน, ) is one of the 16 districts (''amphoe'') of Phra Nakhon Si Ayutthaya province, central Thailand.
History
Bang Pa-in was established in the Ayutthaya era in the name ''Khwaeng'' Uthai. In the Rattanakos ...
, Ayutthaya, Saraburi, Lopburi, and
Singburi, making it long. The newly lengthened road was renamed Phahonyothin Road, in honor of General
Phraya Phahol Pholphayuhasena
Phraya Phahonphonphayuhasena, (29 March 1887 – 14 February 1947) (short form: Phraya Phahon), born as Phot Phahonyothin, was a Thai military leader and politician. He became the second Prime Minister of Siam, prime minister of Siam in 19 ...
(formerly Phot Phahonyothin), the second
Prime Minister of Thailand
The prime minister of Thailand ( th, นายกรัฐมนตรี, , ; literally 'chief minister of state') is the head of government of Thailand. The prime minister is also the chair of the Cabinet of Thailand. The post has existed s ...
and one of the heads of the
1932 revolution.
Route
In
Bangkok
Bangkok, officially known in Thai as Krung Thep Maha Nakhon and colloquially as Krung Thep, is the capital and most populous city of Thailand. The city occupies in the Chao Phraya River delta in central Thailand and has an estimated populatio ...
, Phahonyothin Road originates in
Ratchathewi
Ratchathewi ( th, ราชเทวี, ) is a district in central Bangkok, Thailand. Clockwise from the north, its neighboring districts are Phaya Thai, Din Daeng, Huai Khwang, Watthana, Pathum Wan and Dusit.
History
The district was part ...
district and crosses
Phaya Thai,
Chatuchak,
Bang Khen,
Don Mueang, and
Sai Mai districts before continuing into
Pathum Thani Province, and on through
Ayutthaya,
Saraburi
Saraburi City (''thesaban mueang'') is the provincial capital of Saraburi Province in central Thailand. In 2020, it had a population of 60,809 people, and covers the complete ''tambon'' Pak Phriao of the Mueang Saraburi district.
Location
Sa ...
,
Lopburi
Lopburi ( th, ลพบุรี, , ) is the capital city of Lopburi Province in Thailand. It is about northeast of Bangkok. It has a population of 58,000. The town (''thesaban mueang'') covers the whole ''tambon'' Tha Hin and parts of Th ...
,
Nakhon Sawan
Nakhon Sawan ( th, นครสวรรค์, ) is a city (''thesaban nakhon'') in Thailand, the name literally means "Heavenly City". The city is the capital of Nakhon Sawan Province, and covers the complete subdistrict (''tambon'') Pak Nam P ...
,
Chainat
Chai Nat ( th, ชัยนาท, ) is a town (''thesaban mueang'') in central Thailand, capital of Chai Nat province. It covers the whole ''tambon'' tambon Nai Mueang and parts of Ban Kluai, Tha Chai and Khao Tha Phra, all in Mueang Chai Nat ...
, again through Nakhon Sawan,
Kamphaeng Phet
Kamphaeng Phet is a town (''thesaban mueang'') in central Thailand, former capital of the Kamphaeng Phet Province. It covers the complete ''tambon'' Nai Mueang of the Mueang Kamphaeng Phet district. As of 2020, it has a population of 28,817.
Hi ...
,
Tak,
Lampang
Lampang, also called Nakhon Lampang ( th, นครลำปาง, ) to differentiate from Lampang province, is the third largest city in northern Thailand and capital of Lampang province and the Mueang Lampang district. Traditional names for L ...
,
Phayao
Phayao () is a city (''thesaban mueang'') in northern Thailand, capital of Phayao Province. For administrative purposes the city is divided into 15 sub-districts (''tambons''), which are further subdivided into 172 administrative villages.
The t ...
and finally
Chiang Rai
Chiang Rai ( th, เชียงราย, ; nod, , เจียงฮาย, ) is the northernmost major city in Thailand, with a population of about 200,000 people. It is located in Mueang Chiang Rai District, Chiang Rai Province. Chiang Ra ...
, ending in
Mae Sai
''Mae Sai'' ( th, แม่สาย, ; Shan: , ), is the district town of Mae Sai District in the far north of Chiang Rai Province, Thailand. Mae Sai is a major border crossing between Thailand and Myanmar where the town of Tachileik, in Sha ...
district, where it connects to
Tachileik
Tachileik (also spelt Tachilek; my, တာချီလိတ်, ; shn, တႃႈၶီႈလဵၵ်း, ; th, ท่าขี้เหล็ก, , ), is a border town in the Shan State of eastern Myanmar. It is the administrative seat of Ta ...
in
Myanmar
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...
.
Phaholyothin Road in Bangkok is also a demarcation line between districts or sub-districts in several phases as follows:
#
Thung Phaya Thai
Thung Phaya Thai ( th, ทุ่งพญาไท, ) is a ''khwaeng'' (subdistrict) of Ratchathewi District, downtown Bangkok.
History
This area formerly known as "Thung Phaya Thai", a vast field in the area of inner capital, it covers the area ...
(outbound) and Thanon Phaya Thai (inbound) in Ratchathewi district, as a continuation of
Phaya Thai Road
Phaya Thai Road ( th, ถนนพญาไท, , ) is a major road in Bangkok, Thailand. It begins at the south side of Victory Monument in Ratchathewi District and continues until Sam Yan Intersection in Pathum Wan District, where it inters ...
, from Victory Monument to the bridge over the
Khlong Samsen.
# Phaya Thai (outbound) and Samsen Nai (inbound) in Phaya Thai district throughout the entire area, from the bridge over the Khlong Samsen to the bridge over the Khlong Bang Sue (begins July 26, 2017).
#
Chatuchak (outbound) and
Chom Phon
The Thai rank of Field Marshal ( th, จอมพล, จอมพลทหารบก, Chom Phon) is the most senior rank of the Royal Thai Army. Today it is ceremonially held by members of the Thai royal family and exists only on paper in th ...
(inbound) in Chatuchak district from the bridge over the Khlong Bang Sue to Ratchayothin Intersection.
#
Lat Yao (outbound) and Chan Kasem (inbound) in Chatuchak district from Ratchayothin to Sena Nikhom Intersections.
# Lat Yao (outbound) and Sena Nikhom (inbound) in Chatuchak district from Sena Nikhom Intersection to Thong Chanya Bridge.
# Bang Khen district (outbound) and Sai Mai district (inbound) from the bridge over the Khlong Lam Phak Chi to
Saphan Mai quarter.
# Don Mueang district (outbound) and Sai Mai district (inbound) from Saphan Mai quarter to the administrative boundary line between Bangkok and Pathum Thani.
See also
*
Thai highway network
The Thai highway network follows the left-hand traffic rule of the road. The network is the twin responsibility of the Department of Highways (DOH, th, กรมทางหลวง, ''Krom Thang Luang''), and the Department of Rural Roads (DOR ...
*
Kunming-Bangkok Expressway
*
Further reading
* Thomas fuller
"In Isolated Hills of Asia, New Roads to Speed Trade" ''New York Times'', March 31, 2008
References
{{Road infrastructure in Thailand
AH1
National highways in Thailand
Streets in Bangkok
Ratchathewi district
Phaya Thai district
Chatuchak district
Bang Khen district
Don Mueang district
Pathum Thani province
Phra Nakhon Si Ayutthaya province
Saraburi province
Lopburi province
Nakhon Sawan province
Chai Nat province
Kamphaeng Phet province
Tak province
Lampang province
Phayao province
Chiang Rai province