The Fourth Thai–Lao Friendship Bridge is a highway bridge over the Mekong River that links the Chiang Khong District, Chiang Rai Province of Thailand and Houayxay in Laos. The bridge opened to the public on 11 December 2013. The bridge was the last section of Asian Highway 3 to be built.
Chiang Khong – Huay Xai Friendship Bridge is 630 meters long (with a main span of 480 meters) and is 14.7 meters wide. It is about 10 kilometers from Chiang Khong District in northeastern Chiang Rai Province, in northern Thailand, and about 12 kilometers from Houayxay, the capital of Bokeo Province, northwestern Laos.
North of the bridge, a six kilometer service road connects the bridge to Laotian highway R3A. In the south, a three kilometer service road connects the bridge to the Chiang Khong-Thoen Highway and Route 1129 in Thailand.
Chiang Khong – Huay Xai Friendship Bridge
Location: AH3, Wiang, Chiang Khong District, Chiang Rai 57140 Thailand