Increase in particle number emissions from motor vehicles due to interruption of steady traffic flow |
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Authors: | ER Jayaratne L Wang D Heuff L Morawska L Ferreira |
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Institution: | aInternational Laboratory for Air Quality and Health, Queensland University of Technology, G.P.O. Box 2434, Brisbane QLD 4001, Australia;bURS Australia, 240 Queen Street, Brisbane QLD 4000, Australia |
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Abstract: | We assess the increase in particle number emissions from motor vehicles driving at steady speed when forced to stop and accelerate from rest. Considering the example of a signalized pedestrian crossing on a two-way single-lane urban road, we use a complex line source method to calculate the total emissions produced by a specific number and mix of light petrol cars and diesel passenger buses and show that the total emissions during a red light is significantly higher than during the time when the light remains green. Replacing two cars with one bus increased the emissions by over an order of magnitude. |
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Keywords: | Particle number emission Vehicle emissions Traffic flow Traffic congestion Pedestrian crossing |
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