This paper reports on a co-operative research project between the Queensland University of Technology and Queensland Transport to predict the contributions that motor vehicle emissions from various fleet compositions and traffic conditions make to the level of airborne sub-micrometer particles. Extensive data relating to sub-micrometer particle concentration levels and the corresponding contributing vehicles have been collected at two significantly different Brisbane sites. Functional dependencies between time of a day (for week and weekend days) and speciated vehicle flow were developed. From the statistical analysis of this data, models have been developed that can predict worst case levels of sub-micrometer particle concentrations with a satisfactory level of confidence. The models also indicate how the concentrations are affected by changes in the proportions of petrol/diesel vehicles and increases in CVs. This has significance for use in modelling to assess environmental impacts of alternative transport options. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E208431.
Samenvatting