Phahonyothin Road (Thanon Phahonyothin ถนนพหลโยธิน ), Thailand Route 1

Phahonyothin Road, Thailand (24 December, 2005)


Phahonyothin Road (Thai: Thanon Phahonyothin ถนนพหลโยธิน ), which is also known as Thailand Route 1, is one of the four major highways in Thailand. It starts at the Victory Monument Roundabout in the Ratchathewi district of Bangkok, and ends at the Burmese border, in the town of Mae Sai. Phahonyothin Road covers a total of 1,005 km and is the main road between Bangkok and northern Thailand.

In the early days, there was a path going north from Bangkok until Don Mueang, passing through the Bangkok districts of Phaya Thai, Chatuchak and Bang Khen. In 1938, the route was extended by 162 km, passing through Bang Pa-in, Ayutthaya, Saraburi, Lopburi and Singburi. Over time, the road was further extended to Nakhon Sawan, Kamphaeng Phet, Tak, Lampang, Phayao and Chiang Rai. A final extension eventually brought it to Mae Sai, to connect with Myanmar's Route 4 (Taunggyi-Tarchileik Road).

Phahonyothin Road was named after Phon Phahonyothin, who was later given the title Phraya Phahon Phonphayuhasena by King Prajadhipok (Rama VII).

Map of Phahonyothin Road

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