The Final Workshop organized in the context of the SUREAL-23 research project will be held on Tuesday, 10 December 2019, at the premises of the IFP Energies Nouvelles in Lyon, France. The final results of SUREAL-23 projects will be presented, on “Measuring and the regulating sub-23 nm particles emissions of light-duty powertrains: Questions & Answers from 3 years Horizon 2020 research!”. SURREAL-23 is of high importance for MODALES, therefore coordinators ERTICO – ITS Europe and University of Leeds will be representing MODALES at the workshop. For more information on the event, visit the website.