Carbon Emission Pattern of Driving Car on Vertical Curves of Highway

Low carbon road design has always been a research hotspot for scholars. One of the primary road variables affecting the carbon emission of automobiles is vertical curve, which serves as the primary geometric alignment of the longitudinal portion of the road. The instantaneous speed and acceleration data of cars on various vertical curve sections are gathered for this study by combining simulation and real vehicle experiment methods. This study then built a database of carbon emissions for cars on various vertical curve sections based on the Motor Vehicle Emission Simulator (MOVES) model, used Statistical Product and Service Solutions (SPSS) to analyze the data, and developed a carbon emission model for cars on various vertical curve sections. Finally, it was found that the average error of the carbon emission model for different vertical curve sections was 8.37%, and the accuracy of carbon emission modelling could meet the requirements. The results show that the main influencing factor of carbon emission of cars on vertical curve sections is the radius of vertical curve, and the carbon emission of cars is inversely proportional to the radius of vertical curve. The smaller the value of vertical curve radius is, the more the engine output increases and the greater the carbon emission level will be. This research will provide reference and theoretical support for low-carbon design of highway longitudinal slope sections.