Mountain 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.For me there's beauty and tunnel stability mountain tunnel Mongkon RIT budget, 182000 000, government help. To the people of Betong to travel more convenient. And it is also the first tunnel in Thailand. With the creation of fasteners salvation mountain.