Expanded to 4 lanes completed on Toll Road 106 Mae Pa Phai - Mae Tun Li District, Lamphun Province (Km.60 - Km.74 or Km.154 - Km.168) The distance is more than 14 km to increase the efficiency of travel in this area (which is a long road from Sawankhalok District, Sukhothai Province to the Chiang Mai-Lampang Super Highway intersection, the distance to Doi Suthep and Mae Rim District, Chiang Mai Province, a distance of more than 257 km with 2-4 lanes alternating, so it is another important road connecting the Central to the North) (Thank you for the information and photos from the Department of Highways).