Phahonyothin Road

National Highway 1
National Highway 1
ทางหลวงแผ่นดินหมายเลข 1
ถนนพหลโยธิน; Thanon Phahon Yothin
Route information
	Part of AH1 AH2 AH12
Length	1,005 km (624 mi)
Existed	1910–present
Major junctions
South end	Bangkok, Victory Monument
North end	Mae Sai district, Chiang Rai, ; border to Myanmar
Location
Country	Thailand
Provinces	Pathum Thani, Ayutthaya, Saraburi, Lopburi, Nakhon Sawan, Chainat, Kamphaeng Phet, Tak, Lampang, Phayao
Highway system
	Highways in Thailand; Motorways; Asian Highways;

Phahonyothin Road (Thai: ถนนพหลโยธิน, RTGS: Thanon Phahon Yothin, pronounced [tʰā.nǒn pʰā.hǒn jōː.tʰīn]) or Highway 1 is a main road in Bangkok and one of the four primary highways in Thailand, which include Mittraphap Road (Highway 2), Sukhumvit Road (Highway 3), and Phet Kasem Road (Highway 4). It begins at Victory Monument in Bangkok and runs north to the Burmese border, with a total length of 1,005 km (624 mi).

National Highway 1
ทางหลวงแผ่นดินหมายเลข 1
ถนนพหลโยธิน Thanon Phahon Yothin

Route information

Part of AH1 AH2 AH12

Length	1,005 km (624 mi)
Existed	1910–present
Major junctions
South end	Bangkok, Victory Monument
North end	Mae Sai district, Chiang Rai, border to Myanmar

Location
Country	Thailand
Provinces	Pathum Thani, Ayutthaya, Saraburi, Lopburi, Nakhon Sawan, Chainat, Kamphaeng Phet, Tak, Lampang, Phayao

Highway system
Highways in Thailand Motorways Asian Highways