Phahonyothin highway
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Phahonyothin highway (Thai highway 1, Thai: ถนนพหลโยธิน) begins at Victory Monument in Bangkok heading towards northern Thailand.
When it is out of Bangkok, the provinces along the road are Pathum Thani, Ayutthaya, Saraburi, Lopburi, Nakhon Sawan, Chainat , again Nakhon Sawan, Kamphaeng Phet, Tak, Lampang, Phayao and ends in Mae Sai district of Chiang Rai Province. There it is linked to Tachileik in Myanmar. Altogether the highway has a length of 1,005 km.
The road is named in honor of General Phraya Phahol Pholphayuhasena (Phot Phahonyothin), the second Prime Minister of Thailand and one of the heads of the 1932 revolution.