Thailand is the main road connecting Route 4 North. Northeast, Midwest and the South, centered on the central part of the country. This is a secondary road connecting the province between the district and sub-district more. The total distance of over 51,000 kilometers
The main road 4 route, connecting north, northeast, West and south, with the route in the central part of the country. The secondary road digest province between district and district again.51.000 km