Above the blue waves, a huge steel dragon full of deep red crosses the river, which is spectacular.

This is another crossing channel on the Yangtze River. At the construction site of the G3 Tongling Yangtze River Road and Railway Bridge, the construction of the bridge's annexed projects is being carried out in an orderly manner. At present, this bridge with a total length of 11.88 kilometers has been fully connected, and all ancillary projects have been completed and will be opened to traffic in July this year.

In order to enhance the ability of crossing the Yangtze River main line, this bridge has achieved the merger of "highways, intercity railways, and freight railways" across the river. "The combined construction of road and railways requires meeting the safety and comfort of high-speed rail driving, and puts forward high requirements for indicators such as vertical stiffness of bridges and longitudinal displacement of beam ends." said Xiao Haizhu, chief engineer of China Railway Bridge Institute.

What to do? In the design of the G3 Tongling Yangtze River Road and Railway Bridge, the two types of cable-stayed bridges and suspension bridges are organically combined, which not only retains the advantages of cable-stayed bridges with high stiffness, but also takes advantage of the characteristics of suspension bridges' strong crossing ability. At the same time, by adopting the cross-dragon joint solution, saving 3 to 6 months of construction periods, which not only achieves dual optimization of technology and construction periods, but also creates the world's first double-layer cable-stayed-suspense collaborative system bridge.

A bridge is flying to closely connect Tongling city on the south bank of the Yangtze River and Tongyang County on the north bank. After completion and opening to traffic this year, it will not only become a convenient channel for national highway trunk lines and medium- and short-distance intercity transportation, but will also form a rapid rail transit line connecting Hefei, Anqing and Tongling city areas, realize optimal resource allocation on a larger scale and promote coordinated development of the regional economy.

Looking at the Yangtze River Economic Belt, the construction of cross-river channels is accelerating, and key highways are also continuing to extend. Looking westward, the construction of the Hubei section of the Wuchong (Wuhan to Chongqing) Expressway is in full swing. At present, the Hanchuan to Tianmen section has been completed, the Wuhan to Hanchuan section and the Suiyue Expressway to Tianmen Jingmen section are expected to be completed by the end of this year. The Tianmen Jingmen to Erguang Expressway section is planned to be completed by the end of next year. The four projects have completed an investment of 28.8 billion yuan over the time sequence, accounting for 73% of the total investment.

"Wuzhong Expressway is located between the two expressways of Shanghai-Chengdu and Shanghai-Chongqing, and is an important part of the "Yangtze River Delta-Chengdu-Chongqing Main Axis" in the main skeleton of the national comprehensive three-dimensional transportation network. After completion, it will effectively strengthen the economic connection between the urban agglomeration in the middle reaches of the Yangtze River and the urban agglomeration in the Yangtze River Delta and Chengdu-Chongqing, and provide strong support for the high-quality development of the Yangtze River Economic Belt." A relevant responsible person from the Hubei Provincial Development and Reform Commission said.

The main road along the river is an important part of the comprehensive three-dimensional transportation corridor of the Yangtze River Economic Belt. According to the Highway Bureau of the Ministry of Transport, as of the end of last year, the total mileage of the regional highway network in the Yangtze River Economic Belt reached 2.446 million kilometers, of which the total mileage of the trunk roads reached 309,000 kilometers, and the mileage of the expressways opened to traffic was about 73,000 kilometers. The main passage along the river expressway across the east and west has been initially formed, with a mileage of more than 3,500 kilometers, with a completion rate of 80%.

"Enhanced river main roads will help build and improve a comprehensive three-dimensional transportation corridor with the main stream of the Yangtze River connecting the upstream and downstream and the left and right banks, strengthen regional coordination and integration, better give full play to the unique advantages of the Yangtze River Economic Belt across the east and west, hosting the north and south, connecting the rivers and seas, and further promote the high-quality development of the Yangtze River Economic Belt." A relevant responsible person of the National Development and Reform Commission said.

"At present, there are still bottlenecks and difficulties in the construction of the trunk road network along the river, such as many sections to be completed and inter-provincial bottleneck problems are highlighted." A relevant person in charge of the Comprehensive Planning Department of the Ministry of Transport said that in the next step, we will actively seek support for ultra-long-term special treasury bond funds, and accelerate the improvement of the trunk road network along the river. "On the one hand, scientifically promote the expansion and transformation of busy national expressway channels, accelerate the construction of ordinary national and provincial trunk roads and the quality upgrade of low-grade sections, and improve the overall efficiency of the road network. On the other hand, we will actively guide neighboring provinces and cities to strengthen coordination and coordination in the process of road network planning and project construction, comprehensively consider construction standards and construction timing, and continuously eliminate inter-provincial bottlenecks of trunk roads."