Print Email Facebook Twitter Particle number concentration near road traffic in Amsterdam (the Netherlands): Comparison of standard and real-world emission factors Title Particle number concentration near road traffic in Amsterdam (the Netherlands): Comparison of standard and real-world emission factors Author Keuken, M.P. Moerman, M. Voogt, M. Zandveld, P. Verhagen, H. Stelwagen, U. de Jonge, D. Publication year 2016 Abstract In this study, NOx and particle number concentration (PNC) at an urban background and a traffic location were measured in the city of Amsterdam (the Netherlands). Modelled and measured contributions to NOx and PNC at the traffic location were used to derive real-world PN emission factors for average urban road traffic. The results for NOx were applied to validate our approach. The real-world PN emission factors (#.km-1) were 2.9E+14 (urban road) and 3E+14 (motorway). These values were at least a factor eight higher than dynamometer-based PN emission factors from COPERT 4 and HBEFA databases. The real-world PN emission factors were used to model the contribution to PNC near road traffic in 2014. This was two to three times higher than the PNC urban background along urban roads over 20,000 vehicles per day and near motorways. The discrepancy between dynamometer-based and real-world emission factors demonstrates the need for more PNC observations to assess actual PN emissions from road traffic. © 2016 Elsevier Ltd. Subject Urban Mobility & EnvironmentSUMS - Sustainable Urban Mobility and SafetyELSS - Earth, Life and Social SciencesEnvironment & SustainabilityEnvironmentUrbanisationEmission factorsParticle numberRoad traffic To reference this document use: http://resolver.tudelft.nl/uuid:c1e2f2c9-f13b-416c-af86-37fe13941c18 DOI https://doi.org/10.1016/j.atmosenv.2016.03.009 TNO identifier 534105 Publisher Elsevier Ltd ISSN 1352-2310 Source Atmospheric Environment, 132, 345-355 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.