Bangkok - Nakhon Sawan - Tak - Lampang - Phayao - Chiang Rai (Asia or older AH2) come from Rangsit Road. (Highway 1) and turn left onto Highway 32 at Wang Noi. Then via Ayutthaya, Sing Buri, on Highway 1 again, the province directly to Nat province of Kamphaeng Phet, Tak, Nakhon Sawan, pass straight into Thoen, Lampang, Phayao, then straight through Ngao. The total distance of 830 kilometers to Rai.