一、改建的意义青藏公路从青海省西宁市起,至西藏自治区拉萨市,全长1,940多公里,是世界闻名的高原公路之一(又称世界屋脊公路)。也是由内地通往西藏的主要交通干线之一。它担负着80％以上的进藏物资的运输。1974年经国家计委批准将该路由原来的砂石路面改建为沥青路面,按二级公路标准进行改 I. Significance of Reconstruction Qinghai-Tibet Highway runs from Xining City, Qinghai Province to Lhasa, Tibet Autonomous Region, covering 1,940 kilometers in length. It is one of the world famous plateau highways (also known as the Roof Road in the World). It is also one of the major transport routes from the Mainland to Tibet. It is responsible for more than 80% of the transport of goods into Tibet. Approved by the State Planning Commission in 1974, the original gravel pavement of the route was converted into asphalt pavement and changed according to the secondary road standards