What is the first expressway connecting Chengdu, Sichuan and Lhasa, Tibet?

Overview of Sichuan-Tibet Railway: Sichuan-Tibet Highway is the first highway connecting Chengdu, Sichuan and Lhasa, Tibet. Before the completion of this road, for thousands of years, the economic and cultural exchange hub of all ethnic groups in Southwest China was the Tea Horse Road, a traffic post road with the highest terrain and steepest road conditions in the world, located between the Hengduan Mountains and the mountains on the Tibetan Plateau. The distance from Ya 'an, Sichuan to Lhasa, Tibet is more than 2,000 kilometers, and it is transported by yak.

Only once a year, and it takes more than half a year to travel by horse. 1April, 950, Sichuan-Tibet Highway was opened to traffic, and the new China road-building army split mountains to control water. 1954 65438+On February 25th, it was finally opened at the same time with another equally great Qinghai-Tibet highway, which was a feat in human history. A war song "Singing Erlang Mountain" is popular all over the country. To enter Tibet along the Sichuan-Tibet highway, you have to climb mountains and mountains and cross rapids. The road is difficult and dangerous, but the scenery along the way is magnificent, including snow-capped mountains, virgin forests, grasslands, glaciers and many major rivers (Jinsha River, Lancang River, Nujiang River, etc. ) is a paradise for tourists and photographers. Now Sichuan-Tibet Highway is an important part of National Highway 3 18, which has a south line and a north line. The branch line is located in Dongerluo Township in front of xinduqiao town, Ganzi Prefecture, Sichuan Province.

The southern line of Sichuan-Tibet line was officially opened to traffic on 1958. The southern line starts from Ya 'an to National Highway 108, crosses Erlang Mountain to the west, passes through Dadu River, Yalong River, Jinsha River, Lancang River and the upper reaches of Nujiang River, passes through Yajiang River, Litang River and Batang River, crosses Zhubalong Jinsha River Bridge to Tibet, and then passes through Mangkang, Zuogong, Bangda, Basu, Ranwu, Bomi, Nyingchi and Moho. Compared with the northern line, most places where the southern line passes are densely populated areas. There are high mountains and canyons along the way, and the scenery is more beautiful, especially in Linzhi area, which is known as the south of Tibet. However, the mountains in Tongmai area of the southern line are relatively loose, which is prone to mudslides and landslides. The southern Sichuan line from Chengdu to Lhasa is 2 142 km long, passing through Litang, which is known as the world's high city, with the highest elevation of 4700 meters. Chengdu-Ya 'an section of the southern line, from the plain of western Sichuan to the low hills of the basin, is an expressway. Ya 'an-Kangding section is located in the western Sichuan Plateau, that is, the southeast low margin of the Qinghai-Tibet Plateau, especially Erlang Mountain in tianquan county, Ya 'an, which was once called the first danger of Sichuan-Tibet Highway. The terrain is gradually rising, and mountains and rivers are vertically distributed along the north-south line. The highway is basically going over mountains and then along the river, then over mountains and then west along the river. Erlang Mountain is about 3500 meters high. After the tunnel passed, it was no longer called a natural barrier.

However, after crossing the mountain, the asphalt pavement is often washed away by the flooded river in the rainy season, and sometimes mudslides occur. Out of Kangding, you must climb the folding mountain at an altitude of 4290 meters. This mountain is a geographical dividing line, with plateau uplift in the west and Yalong River, alpine canyon and Dadu River on the right. Zheduo Mountain is the dividing line between Tibetan and Chinese traditions. There are significant differences in population distribution, production and living conditions on both sides of this mountain. The Dadu River basin is in a transitional zone in terms of ethnic and cultural forms, and there are mainly Tibetan branches called Jiarong. Its area can be as far north as Jinchuan, Aba Prefecture, Sichuan Province. The east of Zheduo Mountain belongs to subtropical monsoon climate, which is basically in the rain curtain zone of West China. Dense vegetation, rainy in summer and snowy in winter. Surface water and rivers have obvious erosion and cutting effects on mountains and subgrade. The western part of Zheshan Mountain is the intersection of sub-frigid monsoon climate and plateau continental climate. The climate is mild and cold, with abundant rainfall.

The gentle slopes are grasslands, the valleys are forests, and there are many snow peaks and Alps. As a result, the road has entered more than 800 kilometers of gully-like geological broken sections covered with grass, and it is on the rise. During the rainy season from Bomi to Pailong in Tibet, the raging mudslides and landslides make the earth crawl, and their power is enough to make people driving here thrilling until they cross the Sejila Pass in Linzhi County, Tibet. This line has endless mountains and endless rivers. Almost all natural disasters on the Sichuan-Tibet line are concentrated in this section. Passing through the Sala Pass, especially Linzhi, is a high-grade highway that goes straight to Lhasa.

Sichuan-Tibet North Line The Sichuan-Tibet North Line starts from Chengdu, passes through Ya 'an to Ganzi, passes through Gangga Jinsha River Bridge, passes through Luhuo, Ganzi and Dege, and then reaches Bangda, where the north-south line meets, and passes through Bomi and Bayi to Lhasa, with a total journey of 24 13 kilometers. This line is called Xiaobei Line by tourist explorers. The other northern line runs from Chengdu to the north, from Wenchuan to National Highway 2 13, and from Brush Temple to Lhasa via Marcand and Changdu, which is an important part of National Highway 3 17. The south line and the north line are connected by national highway 2 14 in Changdu and Bangda. The northern line joins the Qinghai-Tibet Highway at Naqu along National Highway 3 17, and can also reach Lhasa. It is also an integral part of the Qinghai-Tibet Highway.

The total length of Chengla cable in northern Sichuan is 24 12km. This line was called great north Line by later tourist explorers. The North Sichuan Line refers to: from Chengdu to the north, in Yingxiu Town to the west, passing through Wolong Nature Reserve, crossing Balang Mountain (4520 meters above sea level), passing through Xiaojin County and reaching Danba. After entering Ganzi, it entered Tibet via Daofu, Luhuo, Ganzi and Dege via Gangga Jinsha River Bridge, and then entered Lhasa via Jiangda, Changdu, Luwuqi, Baqing, Suoxian and Naqu. Compared with the southern line, the northern line passes through pastoral areas (such as Naqu area), with higher altitude, less population and more primitive and magnificent scenery.

Compared with the xinduqiao-Batang section of the southern line, the xinduqiao-Dege section of the northern line of the Sichuan-Tibet line basically runs along the Xianshui River and Yalong River, with grasslands, canyons, rivers and river plains, which are not as high and gentle as the southern line. Among them, Danba is the main distribution area of Jiarong Tibetans. Tagong Prairie (also known as Maoya Prairie) is famous for its scenery and humanity. The folk houses in Daofu, Luhuo and other places are the best in Kangqu and even the whole Tibetan area. Ganzi County Valley is an excellent agricultural area in Kangqu, with many temples, while Manigango, Xinluhai and Queer Mountain have beautiful natural scenery. Dege is the cultural center of the whole Tibetan area. The highest point along the way is Queer Mountain at an altitude of 49 16 meters.

The scenery is beautiful, and the ice peak snow mountain is as beautiful as a fairy in the clouds. Shiqu has the most beautiful grassland in Kangqu. For example, from Shiqu to Yushu Prefecture in Qinghai, you can reach Xining, the capital of Qinghai, or Qinghai Lake through Maduo and Hot Springs. Along the way, plateau lakes, snow-capped mountains and hot springs are densely covered, and few tourists are involved. It is the best route that cross-country explorers admire. May and mid-August -65438+ 10 are the best time to enter and leave Tibet along the Sichuan-Tibet line every year. May to August is the rainy season in the west, and there are frequent mudslides and landslides on the Sichuan-Tibet line, so the trip should be relatively plentiful. In addition to enjoying the particularly beautiful and attractive scenery of the Sichuan-Tibet line in the rainy season, you also need the courage and determination to cross the landslide area on foot.

Tibet needs to apply for border passes in Shigatse: Zhongba County, Saga County, nyalam county, Dingri County, Kangma County, Donglai County, Gamba County, Dingjie County, Jilong County, Shannan District: Cuona County, Zilong County, Luozha County, Langkazi County, Linzhi District: Milin County, Langxian County, Chayu County, Motuo County and Ali District. Songcuo is 50 kilometers away from Gongbu River and is known as Jiuzhaigou in the Plateau. There are islands in the lake and temples in the island, and the scenery is charming. There is no shuttle bus, only an off-road vehicle. 0/9 km from Baiju Scenic Area/KLOC-.