Responsibilities of Nan Highway District 1

Nan Highway District 1 is responsible for the southern part of Nan Province,
comprising Mueang District, Phu Piang District, Santi Suk District, Mae Chrim District, Na Muen District, Nan Noi District, Wiang Sa District, Ban Luang District, and parts of Chiang Muan District, Phayao Province, and Rong Kwang District, Phrae Province.

Total road length under its responsibility
575.391 km (asphalt pavement).