Kunming–Bangkok Expressway is a proposed international expressway running from Kunming, Yunnan province, People's Republic of China, to Bangkok, Thailand via Laos The first expressway sections were opened in 2008.^[1]

The expressway will be approximately 1,900 km (1,200 mi) in length when complete; about 730 km (450 mi) was completed from Kunming via Xiaomenyang to Jinghong) and crossing the Lao border at Mohan, all in Yunnan, by 2017 ^[2] and the next 250 km (160 mi) of the Highway, south of China within Laos follows Route 13 then Route 3.

It was jointly funded by China, Laos, Thailand and the Asian Development Bank.

It traverses jungle and highlands in southern Yunnan and Northern Laos before entering Thailand at Chiang Khong. It then continues southward, largely following Thai Route 1, which becomes an Expressway standard road near Bangkok but which is largely an at-grade dual carriageway along most of its length within Thailand. Within Laos, as of May 2019 the road is an undivided two lane highway.^{[citation needed]}

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¹Some distances on existing roads if expressway distances unavailable

Expressways also planned or under construction: Kunming to Mandalay (Burma) and Kunming to Hanoi (Vietnam). Expressway completed between Vang Vieng and Vientiane in 2020.^[3]

• Asian Highway Network AH1, AH2, AH3
• China National Highways
• Thai highway network
• Phahonyothin Road

• UNESCAP - About the Asian Highway Archived February 21, 2014, at the Wayback Machine