| Urban traffic system is not only one of the main sources of carbon emissions in the city in China,and promote green development,the key areas of carbon neutral,achieve "double carbon" is an arduous struggle,therefore needs to be responded to an appeal by the state and development of environmentally friendly way to travel,adjust the structure of travel,intensify construction of carbon emissions trading market.Based on this,this paper mainly studies the following contents:Firstly,this paper studies the energy and environment effects of shared transportation modes represented by ride-hailing.From the perspective of counterfactual thinking,this paper establishes an assessment model for the energy and environment effects of ridehailing from the perspective of the impact of ride-hailing on the amount of traditional travel.Different indicators before e-hailing cars enter the city are used to deduce the amount of traditional travel modes in recent years without considering the impact of ehailing cars.The net carbon emission caused by ride-hailing is obtained by deducing travel volume and establishing energy and environment effect assessment model.Then take Beijing as a case city for case study.The results show that ride-hailing has a negative impact on the environment,and its energy and environment effects are still uncertain.Secondly,this paper establishes a carbon emission allocation model of urban transportation system.Combined with the 2030 carbon emission intensity reduction target proposed by China,this paper calculates the total carbon emission quota of urban transport system.The total carbon emissions of different travel modes from 2020 to 2030 are predicted,with full consideration of equity and efficiency factors.The carbon emission quota of different travel modes was determined and optimized based on entropy method and ZSG-DEA model.Then the carbon emission allocation of urban transportation system in Beijing is studied.The results show that bus,subway and ridesharing modes should be allocated more carbon quotas than the historical situation,which are 745.77,1133.89 and 2.5954 million tons,respectively,while traditional cruise vehicles,private cars and non-ride-sharing modes are on the contrary,which are 94.73,2159.88 and 2.281,200 tons,respectively.Finally,this paper establishes a carbon trading pricing model of urban transportation system.Based on the carbon emission quota and predicted carbon emissions of different modes of travel,this paper determines the emission reduction target of urban transport system and the modes of travel that need to undertake emission reduction responsibility.Using the marginal emission reduction cost curve of the shadow price of carbon emission calibration system of urban transportation system with different emission reduction ratio,the marginal emission reduction cost expression of a single travel mode is determined by using coordinate transformation technology.Based on this,aiming at minimizing the sum of emission reduction cost and transaction cost of the system by its own efforts,the emission reduction cost model was established to solve the carbon trading price.Then it calculates the carbon trading price of Beijing’s urban transportation system.The results show that the carbon trading price of urban transportation system from 2020 to 2030 is156.17 yuan/ton of carbon,and the carbon trading market has good energy and environment characteristics and economic and environment benefits.This paper sets up different scenarios to compare and analyze the impact of ridehailing on carbon emission allocation and transaction pricing of urban transportation system.The research results show that ride-hailing can increase the carbon emission quota of buses and subways and improve the efficiency of system operation,and the ridesharing mode of ride-hailing is conducive to energy conservation and emission reduction,and is more conducive to the development of carbon trading market. |
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