The tunnel Mongkon RIT built to alleviate traffic congestion. Construction of reinforced concrete. There is a long distance 273 meters wide 9 meters high 1 meters and burn them to the safety of motorists. A joist going through this. Is the way to the popular photography often. For me there's beauty and tunnel stability. The secretion car through this is children shout sound boo and smile with happiness, because the noise will reflect ดังทั้ง tunnel, the tunnel. Budget, 182000 000, government help. To the people of Betong to travel more convenient. A simple call that is a shortcut for the convenience of the people, and is also the first joist tunnel effect building fasteners survived the mountain.