title: Noise measurements as proxies for traffic parameters in monitoring networks.
abstract: The present research describes how microphones could be used as proxies for traffic parameter measurements for the estimation of airborne pollutant emissions. We consider two distinct measurement campaigns of 7 and 12 days, at two different locations along the urban ring road in Antwerp, Belgium, where sound pressure levels and traffic parameters were measured simultaneously. Noise indicators are calculated and used to construct models to estimate traffic parameters. It is found that relying on different statistical levels and selecting specific sound frequencies permits an accurate estimation of traffic intensities and mean vehicle speeds, both for light and heavy vehicles. Estimations of R(2) values ranging between 0.81 and 0.92 are obtained, depending on the location and traffic parameters. Furthermore, the usefulness of these estimated traffic parameters in a monitoring strategy is assessed. Carbon monoxide, hydrocarbon and nitrogen oxide emissions are calculated with the airborne pollutant emission model Artemis. The Artemis outputs fed with directly measured and estimated traffic parameters (based on noise measurements) are very similar. Finally, a method is proposed to enable using a model calibrated at one location at another location without the need for new calibration, making it straightforward to include new measurement locations in a monitoring network.
authors: Acoustic Group, Department of Information Technology, Ghent University, St. Pietersnieuwstraat 41, 9000 Gent, Belgium. Arnaud.can@intec.ugent.be
authors: A
authors: A
authors: Can
authors: L
authors: L
authors: Dekoninck
authors: M
authors: M
authors: Rademaker
authors: T
authors: T
authors: Van Renterghem
authors: B
authors: B
authors: De Baets
authors: D
authors: D
authors: Botteldooren
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001530:Belgium; D002248:Carbon Monoxide / Q000032:analysis; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods*; D006838:Hydrocarbons / Q000032:analysis; D015233:Models, Statistical; D018986:Motor Vehicles; D009589:Nitrogen Oxides / Q000032:analysis; D009622:Noise; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D006838:Hydrocarbons; D009589:Nitrogen Oxides; D001335:Vehicle Emissions; D002248:Carbon Monoxide