Print Email Facebook Twitter Implications of diesel emissions control failures to emission factors and road transport NOx evolution Title Implications of diesel emissions control failures to emission factors and road transport NOx evolution Author Ntziachristos, L. Papadimitriou, G. Ligterink, N. Hausberger, S. Publication year 2016 Abstract Diesel NOx emissions have been at the forefront of research and regulation scrutiny as a result of failures of late vehicle technologies to deliver on-road emissions reductions. The current study aims at identifying the actual emissions levels of late light duty vehicle technologies, including Euro 5 and Euro 6 ones. Mean NOx emission factor levels used in the most popular EU vehicle emission models (COPERT, HBEFA and VERSIT+) are compared with latest emission information collected in the laboratory over real-world driving cycles and on the road using portable emissions measurement systems (PEMS). The comparison shows that Euro 5 passenger car (PC) emission factors well reflect on road levels and that recently revealed emissions control failures do not call for any significant corrections. However Euro 5 light commercial vehicles (LCVs) and Euro 6 PCs in the 2014–2016 period exhibit on road emission levels twice as high as used in current models. Moreover, measured levels vary a lot for Euro 6 vehicles. Scenarios for future evolution of Euro 6 emission factors, reflecting different degree of effectiveness of emissions control regulations, show that total NOx emissions from diesel Euro 6 PC and LCV may correspond from 49% up to 83% of total road transport emissions in 2050. Unless upcoming and long term regulations make sure that light duty diesel NOx emissions are effectively addressed, this will have significant implications in meeting future air quality and national emissions ceilings targets. © 2016 Elsevier Ltd Subject Urban Mobility & EnvironmentSTL - Sustainable Transport & LogisticsELSS - Earth, Life and Social SciencesMobility & LogisticsEmissionUrbanisationDiesel light duty vehiclesNOx emissionsEFsEmission control technologiesCOPERTHBEFAVERSIT To reference this document use: http://resolver.tudelft.nl/uuid:4a0552f4-a6fb-487e-8d83-d9591545edf1 DOI https://doi.org/10.1016/j.atmosenv.2016.07.036 TNO identifier 546234 Publisher Elsevier Ltd ISSN 1352-2310 Source Atmospheric Environment, 141, 542-551 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.