Abstract
Conventional estimation methods of environmental load from vehicle traffic generally use macroscopic emission factors explained by average travel speed. However, it cannot analyze the microscopic effects by traffic flow improvement on bottleneck mitigation or signal control. The study aims to estimate the amount of environmental load due to various microscopic traffic conditions using acceleration indicator, which strongly affects emission level. It is shown that estimated result of the reduction effect of environ mental load by microscopic estimation is greater than that of the macroscopic one when the frequency of ‘stop-and-go’ is reduced due to traffic mitigation.
