Signal timing optimization simulation on urban road intersection based on vehicle emissions

The urban road intersections are the most serious areas polluted by the vehicle emissions, Gongnong square intersection was selected as an example in this paper. The purpose of this paper is to quantitatively determine the approximate magnitude of emissions reduction that can reasonably be expected from the change of a signal timing program, and to determine how the change of a signal timing program could contribute to the reduction of air pollutants in at specified Intersection. The transient emission rates and the evaluation of emissions in different driving modes were all analyzed and compared. These have established a foundation for the study of the effects of a signal timing program on real-world vehicle emissions. Results showed that the change of the signal timing program reduced emissions and delay time spent at the intersection.