Research On Road Network Planning Methods For Carbon Control

In the context of the national strategic goal of"CO₂ emission peak and carbon neutrality",various industries have set off a climax of exploring the path to achieve the"dual carbon"goal.The realization of the"dual carbon"goal requires the efforts of"three sides",including energy,consumption,and carbon sequestration.As an important“energy consumption side”,road transportation is a key area for China’s carbon control and emission reduction.The low-carbon development of road traffic has now become a rigid demand.In the process of urbanization in China,road traffic is showing a trend of rapid expansion,and the problems of road traffic and the rapid increase in carbon emissions caused by it run counter to the current rigid demand for carbon control.How to meet the increasing travel demand of residents in the process of urbanization,while also taking into account the rigid carbon control needs of road transportation under the background of the"dual-carbon"strategy,has become an urgent problem to be solved.The research on methodology supporting low-carbon road network planning will become an important starting point for controlling carbon emission reduction from the"energy consumption side"to promote the realization of the"dual carbon"goal.Based on traditional road network planning methods,this paper explores and studies low-carbon road network planning methods under rigid carbon control target constraints,and realizes quantitative assessment of carbon emissions and carbon control strategy recommendations for different road network planning schemes.The methodological support provided by transportation planners and government managers has important practical significance for improving the development level of low-carbon road transportation and realizing the goal of controlling carbon consumption on the consumer side as soon as possible.This paper first analyzes the road network planning and the mechanism of traffic carbon emission control,and sorts out the influencing factors of road network traffic carbon emissions and the three paths of carbon emission reduction"avoid or control traffic generation,transfer travel structure and energy structure,and improve traffic efficiency",And from the two dimensions of road network planning,the"demand-side"and"supply-side",a detailed analysis and elaboration of the mechanism of multiple control strategies and carbon emissions,and a comparative analysis of different control methods,further clarified From the perspective of road network planning,this article promotes the realization of the road network,an important"energy consumption side"carbon emission reduction goal of the concept and ideas.Carbon emission factors and motor vehicle activity data are two major elements for quantitatively estimating the carbon emission levels of different road network planning schemes,the paper first constructed a localized motor vehicle carbon emission factor model.Based on the analysis of the advantages and disadvantages of traditional laboratory bench test and real vehicle test to obtain motor vehicle emission factors,and the direct introduction of foreign motor vehicle emission models,a Chinese localization based on localized fuel consumption data and speed correction factors is proposed.CO₂ emission factor model construction method,and comparative analysis with the data obtained from the actual vehicle test.The results show that this method has made a significant breakthrough in replacing the actual vehicle tests,and can be effectively applied to the carbon emission estimation of the road network,providing a convenient,universal,and economical way to evaluate the CO₂ emission factor at the local level.Based on the construction of the localized carbon emission factor model,this paper proposes three methods for obtaining motor vehicle activity data and road network carbon emission estimation models from the macro,meso,and micro levels to meet different road network planning.The content of the plan has different requirements for studying the granularity,and realizes the assessment of the carbon emission level of different road network planning schemes,and then serves the adjustment and optimization of the road network planning scheme under the constraints of rigid carbon control targets.Based on the quantitative assessment of the carbon emission levels of different road network planning schemes,this paper considers the demand-side"mode transfer"from the perspective of the carbon control path,and builds a road transportation travel structure with the goal of the lowest total carbon emissions of the road network.Two-layer optimization model.The upper model takes the traffic travel structure as the decision variable and the total carbon emission of the road network as the optimization goal.The total carbon emission of the road network is calculated with the help of the emission factor function related to each travel mode and speed.The lower model is Logit SUE traffic distribution model,which inputs the section flow and speed parameters for the upper model.On this basis,two potential applications of the model are further discussed.These models can serve for road network planning.In order to promote the transfer of travel structure mode,the paper considers the carbon control path of"avoid or control traffic generation"on the supply side of the road network.Given the known traffic demand forecast data of traditional traffic planning,the paper considers different road network planning elements,constructed a road network configuration optimization model aiming at the lowest road carbon emission goal,including road network scale control model,road grade gradation optimization model,planning new road plan optimization model,level intersection minimum spacing model,and cross-sectional layout optimization model The model provides method support and index reference for traffic planners in planning and design.Finally,on the basis of the above planning model research,this paper further summarized and refined road network planning methods that consider rigid carbon control target constraints in the future.Taking the road network planning of the central urban area of Changxing County,Zhejiang Province as an example,the current road traffic in Changxing County was analyzed for carbon control demand,and three different carbon control demand scenarios were constructed and the corresponding carbon control targets for different scenarios were determined.According to different carbon control scenarios,a quantitative assessment of carbon emissions was carried out on different planning schemes of Changxing County’s road network,and other planning elements such as intersection spacing and multiple new road schemes were analyzed to verify the effectiveness of the low-carbon road network planning theory methods proposed in this paper.