On the sustainable development strategy of transpo

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On the sustainable development strategy of transportation in big cities in China [Abstract] starting from the concept of sustainable development and the reality of China's national conditions, this paper discusses the cross century development strategy of transportation in big cities in China Suggestions are put forward from six aspects: it includes relieving the land layout and controlling the development scale of the main urban area; Strengthen the construction of new areas and focus on improving the environment of old cities; Build new commercial pedestrian streets (districts); Starting from the actual size of the city, plan and build the subway reasonably; Take measures to curb the peak traffic flow in the central urban area and strengthen the layout, construction, operation and management of urban public parking lots

"China's 21st century industry is the engine of the agenda" puts forward the strategic goal of sustainable development of urban transportation: in the near and medium term, build an urban road network system that is basically compatible with the urban traffic volume, plan and build high-capacity rapid rail transit in the traffic corridor with large passenger flow, and develop various forms of passenger transport; Develop a fast, punctual, safe, convenient and comfortable urban transportation network in the long term, and gradually build a multi-level and multi-level three-dimensional transportation Its core idea is to build a comprehensive transportation network with reasonable planning and layout, coordinated with the ecological environment and land transportation demand, with rapid transportation as the backbone and conventional ground transportation as the network, which has the characteristics of the transportation structure of large cities in different locations in China

in recent years, the expansion and reconstruction of urban roads in China, especially the construction of fast ring roads and subways in Shanghai and Guangzhou, the promotion and use of unleaded gasoline, the standard control of vehicle exhaust emissions and road greening have been enhanced, which has achieved preliminary results in improving urban traffic and environment However, as the main urban area is still expanding outward to varying degrees, and the total number of motor vehicles continues to grow, the traffic congestion and noise pollution in the central area of the main urban area still cannot be fundamentally alleviated Based on the reality that China is still in the primary stage of socialism, the author gives some opinions and suggestions on the sustainable development strategy of trans century metropolitan transportation

1 ease the land layout of big cities and control the scale of the main urban area

the land development layout of big cities in China, based on historical reasons, is mostly a large central cluster layout with the old city as the core and gradually expanding outward, and its roads are mostly circular and radial With the development of social economy, especially the acceleration of urbanization, in addition to vigorously developing fiber materials prepared by small special processes with good safety, cities and towns will be built to accommodate rural surplus labor, the population and land scale of urban areas in large cities will also increase in 2020 In order to avoid the "pie shaped" outward expansion of the main urban area, which leads to the continuous growth of traffic load and the decline of living environment quality, while strictly controlling the scope of the main urban area, it is very necessary to vigorously plan and develop new urban areas (sub cities) or satellite cities with 150000 to 300000 people and supporting facilities, which are based on the main radiation axis and the Sino foreign fast ring and separated by ecological green space This land use development mode has not only convenient rapid transportation links with the main urban area, but also coordinated arrangements for local production and local life; Coupled with the interlocking operation in the field of commodity circulation, the balanced distribution of supermarkets and the development of modern communication networks, it is possible to effectively reduce the centripetal traffic load in the main urban area In addition, the wedging and surrounding of ecological green space and natural mountains and rivers make the residents of the new area closer to nature, so as to obtain a good living environment for the unloading of impact testing machine This land use layout can not only provide guidance for further easing the industry in the main urban area and developing high-tech industries, but also provide a new support point for economic development and absorbing new population for big cities, so that the land use in big cities can become a cluster layout with one main center and multiple sub centers, separated by natural mountains, rivers and gardens Some megacities in China that are developing across rivers or coasts, such as Pudong New Area in Shanghai, Binhe New Area in Tianjin, new city in Dalian, and three towns in Wuhan from mass production to customer injection molding, are likely to become dual center and multi center modern metropolises with complementary functions if they can further control the expansion of central urban areas and increase the construction of satellite cities and new groups The practice of the multi group layout of Zhuhai Special Economic Zone, the garden city and the living environment characterized by the greening of roads and squares, has achieved a greening coverage rate of 39.9%, which is worthy of reference for large and medium-sized cities in China

2 strengthen the construction of new areas and focus on improving the traffic environment of the old city

in recent years, all regions have strengthened the reconstruction of the old city from the perspective of market economy and improving land value-added benefits, so that the main urban area has become an area with concentrated high-rise buildings, commerce, finance and entertainment facilities, while the original residents and polluting industries are mostly migrating to the edge of the main urban area and the new suburban areas This is obviously beneficial to relieve the dense population in the old city, improve the appearance of the old city and improve the central function However, the excessive arrangement of large-scale business and entertainment facilities and the increase of too many jobs are bound to increase the attraction of passenger flow, resulting in busy "ECG" traffic similar to that in Ginza, Tokyo This seems inappropriate for big cities that lack subways

the author believes that in the reconstruction of old cities, in addition to the central business district (CBD) determined in the planning, we should start from the principle of sustainable development and strive to achieve the coordination of social, economic and environmental benefits Therefore, while building necessary commercial, financial, information and entertainment facilities, it is appropriate to maintain an appropriate number of multi-storey and high-rise residential buildings with bottom shops, focus on widening and renovating the main and secondary roads, open up green rest squares, street green spaces and road green belts, and increase necessary social parking spaces and bay type bus stops The completion and opening of Ping'an Avenue in Beijing, the traffic landscape renovation of East and West Chang'an Avenue and extension lines, and the construction of large cultural recreation squares and green spaces in Dalian are all examples of paying attention to the construction of transportation and human settlements in the reconstruction of old cities

in the future, the focus should gradually shift to the development and construction of new areas, especially the expansion of some high-tech industrial zones and environmental construction This is not only the need to control the size of the main urban area, but also the need to expand opening up and promote economic development

One of the core ideas of sustainable development is "people-oriented" In order to meet the needs of residents and foreign tourists to integrate shopping and cultural leisure activities, it is imperative to plan and build a new commercial pedestrian street with modern consciousness and local characteristics This kind of pedestrian block should be located near the old city and commercial center, which is not only related to the surrounding areas

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