Mittraphap Road

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Thai Highway-2.svg

Thailand Route 2
ทางหลวงแผ่นดินหมายเลข 2
ถนนมิตรภาพ Thanon Mittraphap
"Friendship Highway"
Thanon Mittraphap.png
Route information
Part of
Length: 509.113 km (316.348 mi)
Existed: 1957 – present
Major junctions
Southwest end: Saraburi, Thai Highway-1.svg Phahonyothin Rd.
Northeast end: Nong Khai, Thai–Lao Friendship Bridge  Laos
Provinces: Saraburi, Nakhon Ratchasima
Khon Kaen
Udon Thani, Nong Khai
Highway system

Highways in Thailand


Mittraphap Road (Thai: ถนนมิตรภาพ, Thanon Mittraphap) or Thailand Route 2 (Thai: ทางหลวงแผ่นดินหมายเลข 2, Thang Luang Phaen Din Mai Lek 2) is one of the four major highways in Thailand, along with Phahonyothin Road (Route 1), Sukhumvit Road (Route 3), and Phetkasem Road (Route 4). It runs from Saraburi to Nong Khai. It was built with financial assistance from the United States of America.

It is the first highway in Thailand to meet international standards, and the first highway in Thailand to use both asphalt and concrete. It received the name "Thanon Mittraphap" on February 20, 1957. The name literally means "Friendship Road". It is the main road that connects Isan (northeastern Thailand) across the Dong Phaya Yen Range with Saraburi. It passes through the provinces of Nakhon Ratchasima, Khon Kaen, Udon Thani, and ends in Nong Khai, where it links with the Thai-Lao Friendship Bridge to Laos (subsidised by Australia government).