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 has การติดไฟฟ้า to safety in driving cars.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 and also a mountain tunnel of Thailand.