Calculation of Carbon Emission of Urban Districts during Vehicle Restriction by Tail Number

For a quantificational analysis of the influence of vehicle restriction by tail number on the car emission of urban districts,the carbon emission calculation model with vehicle restriction was established.Firstly,the impact of vehicle restriction on car trips was analyzed,and on the assumption that car trips over time were basically consistent before and after restriction,car trips of different periods in a day was obtained by the function of car trips over time based on historical statistics of the city.According to the rule of UE,the car distribution of every road of the network was acquired,and according to the Green Shields model,the vehicle speed of each road was calculated.The TRANSYT 7-F model was adopted to calculate the carbon emission of each road in the peak hour and a whole day,and then the carbon emission of a whole day of the road networks was gained.Finally,a case study indicated that the method was relatively reasonable and accurate.