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What is the total mileage of Qinghai Highway in Qinghai Province?
By the end of 2000, the total mileage of highways in Qinghai Province was 22,679 kilometers, including paved roads 1.9 1.22 kilometers, including 963 kilometers of high-grade highways, 5 1.27 kilometers of secondary highways, 2,957 kilometers of intermediate highways and 1.007 of low-grade highways. At present, the five national highways in the province form the main skeleton of two horizontal (namely, national highway 109, national highway 3 15) and three vertical (namely, national highway 2 14, national highway 2 15 and national highway 227). Twenty-three provincial highways crisscross, and more than 330 county and township highways are connected, forming and radiating the highway network of urban and rural pastoral areas in the province. Our province is located at the source of rivers and there are many rivers. There are 46,804 m/1.930 bridges in the province, including permanent bridge 1.923, accounting for 99.6%, and 70 extra-large bridges and bridges have been built.

Qinghai is located in a high altitude area. There are many towering peaks and ice peaks in the territory, and most of them are cross-mountain highways. Dabanshan Tunnel on National Highway 227 is1530m long, which is the highest in Asia. The two tunnels on Wuhe Road on Provincial Highway are 202m long. According to the purpose of giving priority to transportation and benefiting Qinghai, combined with the actual situation, the tenth five-year plan of Qinghai Province was formulated. By 2005, the mileage of highways will reach 25,000 kilometers, that of expressway will reach 2 19 kilometers, that of first-class highways will reach 183 kilometers, that of second-class highways will reach 5,000 kilometers, and that of high-grade sub-class highways will reach 8,000 kilometers, making Xining and Golmud export highways become expressway or first-class highways. The highway from Xining to the state capital reaches Grade II, the highway from state to county reaches Grade III, the oil road from county to county, the road from township to township, the administrative village road in the eastern agricultural area, the road from animal husbandry area or the road from machine to car. And 109 national highway (Beijing-Lhasa), with a total length of 4590 kilometers.

Qinghai section starts from Minhe Xiangtang Bridge and passes Ledu, Ping 'an, Xining, Huangyuan, Daotang River, Chaka, Dulan, Golmud and Tanggula Pass, with a total length of 1.484 km. Along the way, it passes through Sun Moon Mountain, Chahan Temple Mountain (Rubber Mountain), Wangga Xiushan, Toto Mountain, Kunlun Mountain, Huofeng Mountain and Tanggula Mountain, and it passes through Huang Shuihe, Chahan Susu River, Xiangride River, Golmud River, Xueshui River, Chuma River, Beilu River, Tuotuo River and Tongtian River at the source of the Yangtze River, and it also passes through canyons and valleys. The scenery along the line is magnificent and full of weather. This is the scenery of the plateau desert. The Qinghai section of National Highway 109 is bounded by Xining, starting from Gan-Su Qing Highway in the east and Qinghai-Tibet Highway in the west.

Although Gan Qing Highway is only 1 10 km long, it has been the main throat of Qinghai since ancient times. After liberation, after four large-scale reconstruction, the whole line has reached the second-class highway standard and become the main trunk highway in the province, connecting Gansu with inland and eastern agricultural areas. The Qinghai-Tibet Highway is divided into the eastern section (Xining to Golmud) and the southern section (Golmud to Lhasa). The eastern section runs through the grassland Gobi; In ancient mythology, the low mountains and wide valleys in the south are fairy pools and Yao platforms where immortals gather. In modern times, it is called the forbidden area of life by foreign explorers. The climate is extremely cold, the freezing period is as long as nine months, and the thickness of frozen soil layer is more than 120 meters.

Since the opening of the Qinghai-Tibet Highway 1954 on February 25th, * * has undergone five large-scale renovations, with the total mileage shortened from the initial 2 100 km to 1937 km, the driving speed increased from 25-30 km before the renovation to 70-80 km, and the driving time in Yueshan section reached the second-class oil road GB. All the bridges and culverts are made permanent, and the road surface is painted black, making it the tallest black dragon in the world and having the reputation of roof road in the world. National Highway 2 14 starts from Xining City, Qinghai Province, and passes through Huangyuan, Daotang River, Qiabucha, Heka, Wenquan, Huashixia, Yellow River, Qingshuihe, Xiewu, Jiegu Town, Nangqian and Duopuma (provincial boundary) and enters Changde.

After liberation, the country rebuilt Qingkang Highway many times, and the road conditions gradually improved. Especially in the large-scale reconstruction of 1985 to 1997, 485.4 kilometers of tertiary roads were built, including 305.6 kilometers of black roads and 7.5 kilometers of cement concrete roads. At present, the Qinghai section of National Highway 2 14 has been completed. The 82 1 km section from Xining to Jiegu Town, the capital of Yushu, except for the 293 km section from Jiangluling to Qingshuihe, which belongs to permafrost or continuous permafrost, all the others meet the third-class oil route standard, and it is the second passage into Tibet in Qinghai Province. National Highway 2 15 starts from Liuyuan Town, Anxi County, Gansu Province, passes through the intersection of Dunhuang and Aksai, passes through Jinshankou, enters Qinghai, and then passes through Huahaizi, Youxiang, Dachaidan and Chaerhan Salt Lake to Golmud, with a total length of 653 kilometers, including 399 kilometers in Qinghai. 198 1 year165438+1October 30th was listed as the national trunk highway, which was once called the Qinghai-Tibet Highway Branch Line, Dung Highway, and also called Liu Ge Highway.

The northern end of National Highway 25 connects with Lanzhou-Xinjiang Railway in Liuyuan Town, which is the main transit line for passenger and cargo transportation in Haixi and Tibet. From Jinshan Chakou and Yukaxixing, you can go to Huatugou and Mangya Asbestos Mine in Gobi Oil City, and then enter Xinjiang. Chaerhan Salt Lake Area is parallel to the Qinghai-Tibet Railway and connected to Golmud Qinghai-Tibet Highway in the south. It is an important trunk line connecting Gansu, Xinjiang, Qinghai and Tibet and running through the Qaidam Basin. The world-famous Zhang Wan Salt Bridge stands on the Chaerhan Salt Lake, which is known as the king of salt lakes. Its subgrade and pavement materials are almost all pure crystalline salt. Road maintenance personnel adopt simple methods, such as leveling salt cover, filling holes, laying salt blocks and pouring salt water to maintain salt roads.

The salt tunnel is like a bridge floating on salt water, which is 33 kilometers long and is called Zhang Wan Salt Bridge. Zhang Wan Salt Bridge is straight and flat, comparable to asphalt road. Its completion has created a precedent for highway construction and maintenance in saline soil areas, and it is a pioneering work in highway history. Qinghai section of National Highway 25 has been rebuilt and upgraded many times since the completion of 1955 simple highway. From 1994 to 1998, 47.5 million yuan and 34 million yuan were invested successively, and the three-stage oil pipeline reconstruction was carried out for Dang (Jinshan) (Da) Chaidan section 18606 km and Geer (Ermu) (Potassium) fertilizer plant section, which made it possible to remove the oil.

Qinghai section of National Highway 227, also known as Zhang Ning Highway, starts from Xining City, Qinghai Province, passes through Qiaotou Town of Datong, Qingshizui, Ebao and Biandukou (provincial boundary) to Zhangye City, Gansu Province, with a total length of 345 kilometers, of which 245.5 kilometers are in Qinghai Province. The route passes through Dabanshan, Jingyangling and Ebaoling, passes through Heilin River, Baoku River and Haomen River, and passes through Qilian Mountain. Among them, Xining-Datong section undertakes heavy coal transportation tasks and is one of the sections with the largest mixed transportation volume in Qinghai Province. The route of Qinghai section of National Highway 27 is similar to Zhangye Road in Xiping, an ancient road. It is a part of the southern route of the ancient Silk Road and played an important military role in history.

Zhang Qian's first mission to the Western Regions and Huo Qubing, two northern expeditions to Xiongnu and Yang Di Emperor Yang Guangxi's expedition to Gu Hun all took this road. But this road was actually built in April of 1950. Limited by financial and material resources at that time, the construction standard was low and the traffic capacity was poor, especially in the mountainous area of Dabanshan Mountain, which suffered from heavy snow every year. After four overhauls, the technical situation gradually improved. In particular, the fourth large-scale reconstruction took nine years, with an investment of 289.8 million yuan and a reconstruction mileage of 242 kilometers, and the highest highway tunnel in Asia was built in Dabanshan. By the end of 1998, Heiquan Reservoir has reached Class III oil standard except for 20 kilometers, and has become an important exit passage of Qinghai Province, connecting Qinghai-Tibet and Qingxin highways in the south and Eurasian Continental Bridge in the north.

When 1954 was built, due to the limitation of financial and material resources, there were many diseases, low construction standards and poor traffic capacity. After several renovations, especially after being included in the eighth five-year plan of highway construction by the Ministry of Communications, the road conditions have been greatly improved. At present, the section from Xining to Zongwu Longshan 6 13km has been blackened. The sections from Zonglongshan to Dachaidan and Mangya to Asbestos Mine are being rebuilt. Ping Highway (provincial highway) starts from Ping 'an Town, where the administrative office of Yu Haidong is located, passes through Qingshashan and Wudaoling to Hualong, passes through the Yellow River Bridge to Yimamuxunhua County, and then passes through Qingshui, Baizhuang and Daowei to the provincial boundary of Dali Mountain, with a total length of172km. With low altitude, mild climate and abundant products, it is an important grain-producing area in Qinghai.

The special highways for Lijiaxia, Gongboxia and Jishixia hydropower stations planned and constructed in the upper reaches of the Yellow River are all connected to Pingda Highway, which is the economic and cultural lifeline of Haidong area and Hualong and Xunhua ethnic autonomous counties. 1September 1969 15, the State Council and the Central Military Commission listed it as one of the national defense highway construction projects. After years of continuous construction and improvement, the whole line has reached the third-class highway standard, including black pavement 1 14 km. The West Highway (provincial highway) starts from Xining City, Qinghai Province, passes through Taojiazhai and reaches Weiyuan Town, Huzhu Tu Autonomous County, with a total length of 44 kilometers. 1938, the original lane has been improved and cars are almost impassable. 1956 re-select the route and build it according to the six-level standard.

1972 paving black pavement; 1986 partial improvement; From 1993 to 1995, another investment of13.02 million yuan was made, and the whole line was transformed according to the third-class oil line standard, reaching the GBM standard. Today, the West Lake Highway is flat, straight, comfortable and beautiful, and is called the road and lifeline of getting rich by local people. Asai Highway (provincial highway) starts from Adai Village, Hualong County, and passes through Xiaduoba, Qunke, Jianzha Qiaotou, Tongren and Zeku to Selong, Henan County (provincial boundary), with a total length of 297 kilometers. North to Xining, the provincial capital, middle to Huangnan Prefecture, south to Luqu and Maqu counties in Gansu, and then to Chengdu, the provincial capital of Sichuan, is a shortcut for Xining to enter Sichuan via Gansu.

Asai Highway was first opened in the early 1950s, which belongs to crawling on the spot and is a secondary highway. After years of maintenance, the road conditions have improved. At present, the 98-kilometer section from Adai to Tongren has completed the third-class oil circuit, and the phenomenon of neck sticking carved from the root appears in the dangerous section of Longwuxia. At the same time, the new line is 22km, which makes the dangerous section of Maixiu Mountain reach the third-class gravel pavement standard; Tongren-Theron section has also been included in the construction plan. The continuous improvement of the road conditions in Asai has given wings to the social and economic development of Huangnan Prefecture, which is called the lifeline and blood transfusion boat by Tibetan compatriots. The Ningguo section of Xijiu Highway (provincial highway) starts from Xining City in the north, enters Huangzhong County along the east bank of Nanchuan River, passes through Lujiacun, Zongzhai, Xujiazhai, Laoyoubao and Shangxinzhuang, crosses the Yellow River Bridge to Helga, passes through Garang along the north bank of the Yellow River, passes through Hexi Town of Guide County, passes through Tuotu Mountain, and passes through Maying, Huangshatou and Huangshatou.

Before the 1980s, although some sections were rebuilt many times, only the section from Xining to Guide could be opened to traffic. After 1980s, Ningguo section of West-Kowloon Highway was listed as the national key construction project in the sixth and seventh five-year plans. In August, 1990, with an investment of 10082 million yuan, the newly-built reconstruction project which lasted for 8 years was completed and opened to traffic, and the whole line reached the third-class pavement standard; 1July, 992, the road from Xining to Guide was hacked. By the end of 1998, 213km oil path had been newly laid, and all the oil paths have been connected. The completion of Ningguo section of Jiu Highway and the continuous improvement of technical level have ended the long history of bypassing Huashixia and XXX.

Among them, Xining West Exit 13km, urban trunk line width of 40m, tunnel width of 9.25m and earthwork of 3.37 million cubic meters. There are 2056.858m/14 bridges, 5999.806m/17 double bridges, 5 medium bridges 108m /5 double bridges, 523. 15m /7 double bridges, 9 small bridges and pile foundation1. The total investment of the project is 65.438+497 billion yuan, and the construction period is from 2000 to 2003. By the end of 2002, the accumulated investment was165438+99 million yuan. It is planned to invest 298 million yuan in 2003 and 39 million yuan in 1-3 months. Completed in July 2003 1. The west exit project of Xining-Huangyi highway involves the long-term planning of Xining city. In the design process, we negotiated with Xining, urban construction, land planning and other departments for many times, and with the approval of the Ministry of Communications, we selected the best design scheme. Huangyuan-Daotanghe First Class Highway (Huangdao First Class Highway) Huangdao First Class Highway is the main section of National Highway 109. It is the traffic artery from Xining, the capital of Qinghai Province, to Tibet and Yushu, Hainan and Haixi under its jurisdiction.

It has been called the throat of Qinghai-Tibet since ancient times. The total investment of the project is about 704 million yuan, with a total length of 47.3 kilometers. The design driving speed is 60 km/h, the subgrade width is 22.5 m, the design vehicle load of the culvert of the whole bridge exceeds 20, and the trailer 120. 778.5m large bridge, 542.4m medium bridge, 246.5m small bridge, 78 culverts, 492m tunnel and 6 overpasses. Huangdao first-class highway is located in the eastern valley of Qinghai, with high altitude, difficult natural conditions and poor geological and geomorphological conditions along the line. 200 1 10 12, the construction was officially started. The original planned construction period was 3 years, and it was opened to traffic on September 28, one year ahead of the planned construction period, setting a new milestone in the history of Qinghai highway construction. The total length from Xining to Machangyuan expressway is 1 18km, with a total investment of 4.226 billion yuan. The construction period is 2000-03.

It is an important part of the national highway trunk line from Dandong to Lhasa, the main road from the mainland to Qinghai-Tibet, a fast-track connecting Lanzhou and Xining, and occupies an important position in the national and Qinghai highway network. Among them, the section from Xining to Ping 'an is 35km, with an investment of110/000000 yuan, which was completed and put into use at the end of June 2002. The section from Ping 'an to Machangyuan is 83km long, with an investment of 31.1.600 million yuan. The project started in 20001year, with a total investment of 3.3 billion yuan by the end of 2002, accounting for 70.3% of the total project quantity. It is planned to invest 926 million yuan in 2003. In March, the investment was 654.38+82 million yuan, which was completed in July 2003 1. Xining-Machangyuan Expressway includes Pingxi Expressway and Machangyuan-Ping 'an Expressway.

As the first expressway in our province, pingxi expressway officially started construction on February 17, 2000. The route starts from Ping 'an County, where Haidong Administrative Office is located in the east of Qinghai Province, and is connected with National Highway 109 (secondary highway) and Lin (Xia) Ping (An) Highway (tertiary highway) through Ping 'an Interchange. Then the line crosses the north bank of Huangshui River to the west, crosses Hongyazigou, enters Xining via Caojiabao and Xiao Xia, continues to cross the river along the west bank of Huangshui River to Shatangchuan, passes through Xining Railway Station to Xining North Chaoyang, and is connected with Qilian Road, with a total length of 34.78 kilometers. Machangyuan to Ping 'an expressway is located in Haidong District of Qinghai Province, which is an important part of the national trunk line from Dandong to Lhasa planned by the Ministry of Communications. It is also an important section connecting Xining in Qinghai and expressway in Lanzhou, Gansu.

The line starts from the north bank of Huangshui River in Machangyuan Township, borders Qinghai Province and Gansu Province, passes through Minhe County North, Laoyaxia, Gaomiao Town and Ledu County South to the north side of Ping 'an County, and connects with Ping 'an-Xining Expressway Interchange. The total length from Xining to Datong expressway is 36.5 12km, of which K2 700-K7 330 is a secondary highway with a length of 4.63km, and the rest is expressway with a length of 3 1.882km, which is located in the northeast of Qinghai Province, and the starting point of route K2 700 is located on the north side of the third bridge in Qiaotou Town, Datong County. It passed through.

1-3 months investment of 80.76 million yuan. Xining-Huangzhong expressway (West Tower expressway) is a part of Xijiu Highway. It is the main passage from Xining, the provincial capital, to Guide, Dawu, Jiuzhi and Aba in Sichuan, and the only shortcut to Ta 'er Temple, the holy place of Buddhism. Its construction will shorten the distance between Guide County and Guoluo and Xining, promote the economic development of Huangzhong County and strengthen national unity, which is of greater significance.

The total investment of the project is 500 million yuan. The starting point is about 350 meters south of the intersection of Kunlun Road and Tongren Road in Xining, which is the starting point of planning Zhonghai South Road. According to the planned route provided by the planning department of Xining City, it passes through Gaoxinyuan, Shenjiazhai to Shang Xiao and expressway to the end of Hainan Road, passes through the planned Chengnan New District, crosses Huang Ning Highway, and connects with Guide Branch Road and the second-class highway of this project to Mayigou. The main towns passing through are Shenjiazhai Township, Shangjiao, Xinzhuang Village Interchange, Xin 'anzhuang, Yuanbaozi Village, Xiejiazhai, zhang jia zhuang, Wang Bin Fort, Xicun, Chenjiatan and Ta 'er Temple, with a total length of 25.236506 kilometers. Main works: urban roads: 5 separated interchanges, 4 culverts with 2359.53m/4, 2 passages and 2 footbridges, with a line length of 3.68667 km. Expressway: There are 865,438 small bridges +0m/3, 2359.53m/75 culverts, separated overpasses 14 1.04m /3, 28 passages, 3 vehicle overpasses and 2 interchanges, with a long route16.9/kloc.

Secondary highway: small bridge 28m/ seat, large bridge 275.49m/ seat, culvert 186.47m /9, 4 passages, route length 4.636506km ... Guide branch: bridge164.08m/seat, culvert 60m/seat, length/kl. It is the same section of two of the eight export highways connecting Qinghai to the outside world, and it is a bridge to strengthen the economic ties between the northwest, southwest and central and southern regions, and occupies an important position in the national and Qinghai highway networks. After the project is completed, it will improve the investment environment in this area, give full play to Qinghai's resource development advantages, and promote the economic development of Qinghai Province.

At the same time, it is also of great significance for strengthening national unity and consolidating national defense. The starting point (K0 000) is located at the intersection of Pingxi Expressway (K90 694) of Huzhu Horticultural Gardener. The route crosses Huangshui River and Qijia Village in the south, passes through the northeast corner of Qinghai Cotton Mill, and goes south along the west bank of Baishenjiagou. The route is set at the foot of the mountain. And according to the topography of rivers and banks, choose a suitable location to change the coastline. A 3,403-meter-long tunnel (right line) runs south along the left bank of Zhalongxia, passes through Shenjia, Baijia, Dazhaizi, Xinzhuang, Shajia and Gucheng to Shibi, stretches at the bend (Liutaigou), passes through Quanzanggou, Pingda Highway and Langlonggou in Quanzang Village, and goes down to the terminal (Dai) along the right bank of Langlonggou for completion.

The main rivers along the line are Huangshui River, Qijiacun, Baishenjiagou and Langlonggou. This road is the same section of two of the eight export highways leading to the outside world in Qinghai Province. It is connected with Xining and Haidong, the provincial capitals, through the simple interchange of Huzhu Park and Ping 'an connecting line. Set up two interchanges at the location of Dazhaizi and Gucheng township government to connect with nearby towns and other roads. The main towns and villages passing through are Ping 'an Town, Gucheng Township and Zhaba Township.

The Nanjing-Shanghai first-class highway (planning) has a total investment of 499 million yuan and a total length of 34.72 kilometers (including branch lines). Recently, the Provincial Communications Department officially approved the implementation of the Nanjing-Shanghai first-class highway. After the project is completed, it will end the history that Huzhu Tu Autonomous County has no high-grade highways. The proposed Nanjing-Shanghai first-class highway starts from Yunjiakou toll station in pingxi expressway, crosses Lanqing Railway, passes Shatangchuan and Shuangshu Township, and finally connects with the East Ring Road of Weiyuan Town. The main works of this project include bridge 1 6 17m, separated overpass 1 40m, 2 bridges 100m, middle seat 1 40m, culvert 120 and 29 passages.

1In February, 1993, Shaanxi Provincial Highway Survey and Design Institute conducted survey and design, and conducted the first national public bidding. The winning bidder is the First Engineering Office of the 16th Engineering Bureau of the Ministry of Railways. 1995 August 18 officially started. The total investment is 654.38+0.56 billion yuan, of which 70% is allocated by the Ministry of Communications and 30% is raised by the Qinghai Provincial Communications Department. According to the third-class highway construction standard, the tunnel has a clear width of 8.5m (including the roadway width of 7m), a clear height of 4.5m, a tunnel length of 1.530m and a lead length of 2,852m (including seven 30m bridges). The elevation of the entrance pavement center of Dabanshan Tunnel is 3792.75 meters, which is the highest in Asia and the second in the world.

The international management mode of F 1D 1C was applied for the first time in the construction, and many advanced anti-freezing and anti-swelling measures were adopted, such as spillway tunnel, drainage board, geotextile, insulation layer, windproof thermal insulation door and so on. After three years and three months of hard construction, it was successfully completed on June 28th. 1998+065438+. After the completion of the tunnel, it can avoid the area with serious snow on the top of Daban Mountain, shorten the mileage by 5.2 kilometers, and make the Zhang Ning highway unblocked in all seasons. Longwu Yellow River Bridge is located at the intersection of Longwu River and Yellow River in the middle section of Asai Highway. It is the first large-span stone arch bridge in Qinghai Province, with a span of 50m, a total length of 83.45m, a clear width of 7m and a load of 13-60m. 1959 65438+Qinghai Luqiao company started construction in February and was completed in April 1960.

In the construction, the rich local high-quality stone materials and the favorable terrain of arch bridge were used, and the advanced experience of three-stage masonry method of Huanghugang Bridge in Hunan Province was absorbed. The construction speed is fast, the materials are saved and the quality is good. Over the past 40 years, it has played an important role in the development of industry and agriculture, animal husbandry and national unity and progress in Huangnan Tibetan Autonomous Prefecture. Xia Long 1 Tunnel is located in the dangerous section of Longwu Gorge on Asai Highway. Total length170m, width 7+20.5m.. Qinghai Road and Bridge Company was designed by Qinghai Highway Survey and Design Institute, and started construction in June 1990, and was completed and opened to traffic in September 199 1. It is the first highway tunnel in Qinghai Province. After the completion of the tunnel, the mileage was shortened by 2.6 kilometers, and the traffic situation in Longwuxia section was obviously improved.

The Mahuanghe Bridge built by Qinghai Road and Bridge Company is a 6-hole reinforced concrete slightly curved composite bridge, with a length of12.5m and a width of 7.0m. The lower part is bored pile. 1966 started in may and was completed on September 20th. The new technology of rocket cone drilling was adopted in the construction. This bridge is located near National Highway 2 14 maduo county. It is the first permanent bridge in the upper reaches of the Yellow River and has the reputation of "the first bridge in the world". Tuohe Bridge is located on the Tuohe River, 109 National Road, and is 97 kilometers away from Xining1/kloc-0. It is the earliest and longest reinforced concrete bridge built in Tanggula mountain area and has the reputation of the first bridge in the upper reaches of the Yangtze River. This bridge is more than 4700 meters above sea level and is one of the highest bridges in the world today.

It was built in 1958 by the Fifth Engineering Bureau of the General Administration of Highways of the Ministry of Communications. It is a T-beam assembled bridge with 24 spans, 1 1.36 meters and a total length of 273.56 meters. The width of two lanes is 7.0m, and there are no sidewalks and railings. The design load is steam-13 and the resistance is -60. The whole bridge is like a rainbow, hanging between the snow-capped mountains and canyons, quite like the reflection of the sunshine bridge, and the snow ridge falls into the long river. 1987, a T-shaped permanent beam bridge with a hole of 16, a length of 324 meters and a width of 9 meters was built on the west side of this bridge, forming a sister bridge that walked side by side. More than 1000 vehicles pass through this bridge every day and night, and more than 85% of the materials entering Tibet and more than 90% of the materials leaving Tibet have to pass through the Tuotuo River Bridge. Xiangde Bridge is located on Xiangride River, 488km away from Xining, National Highway 109. The total length is

1954, 1 1 year 10. In October, the workers who built Dung Highway entered Chaerhan Salt Lake from the north bank, and the cave blocked their way forward. When they are worried, they have no intention to open the hard salt cover and fill the karst cave. They choose the route in the area with the least and smallest karst cave and fill the roadbed with salt cover. Subgrade and pavement materials are almost pure crystalline salt, which makes cars drive in dangerous cave areas, and roads actually float like bridges. This section of salt lake city highway is 32 kilometers long, which can reach 10000 feet when converted into urban system. Therefore, people call it Zhang Wan Salt Bridge. Road maintenance personnel adopt simple methods, such as leveling salt cover, filling holes, laying salt blocks and pouring salt water to maintain salt roads.

Zhang Wan Salt Bridge is straight and flat, comparable to asphalt road. Its completion has created a precedent for highway construction and maintenance in saline soil areas, and it is a pioneering work in highway history. Qianzhaqu River Bridge is located on the Zhaqu River in the upper reaches of Mekong River, 0 km away from Xining, 21165438. It is a box arch bridge with a main span of 100m and a total length of132.24m. The bridge was constructed by Qinghai Road and Bridge Company on1August 20, 975 and completed on1August 977. It was the longest span bridge in northwest China at that time. The completion of Nangqian Bridge has greatly changed the backward traffic conditions in the southernmost remote counties of Qinghai and facilitated the production and life of the masses. Known by Tibetan compatriots as a rainbow that will never disappear on the grassland.

Great transportation to Qinghai Lake in Beijing: the reference fare for the running time and mileage of vehicles when the train arrives at the station is T 15 1, Xining West 13:47 in Beijing, and KlOC-0/3: 35 the next day, 23 hours and 48 minutes, 2092km hard seat 238,430 T27 in Beijing. Hard sleeper 430T28 Xining Beijing West 10: 19 07:34 the next day, empty express 2 1 hour 15 minutes 2092km, hard sleeper 238, hard sleeper 430T 152 Xining Beijing West/kloc-.