泰国位于东南亚的中南半岛,面积为514,000平方公里,东西最宽处为780公里,南北长1,650公里,南端为马来西亚半岛的狭长地段,北部及西部为山区,东部为缓起伏高原,中部为平原,南部为滨河平原及丘陵。泰国公路较发达,公路货运占总运量的70%,全国公路总里程据1980年统计约为43,000公里, Thailand is located in South-Central Asia, Indochina Peninsula, an area of ​​514,000 square kilometers, the widest point of 780 km east-west, 1,650 kilometers long from north to south, the peninsula of the southern tip of the long, northern and western mountainous areas, east of the plateau, the central plains, The southern plains and hills Riverside. More developed road in Thailand, the road freight transport accounted for 70% of the total volume of national highway mileage in 1980 according to statistics about 43,000 km,