Abstract
This paper introduces the PAREMPI project — Particle Emission (PM) Prevention and Impact: From Real-World Emissions of Traffic to Secondary PM in Urban Air – funded under the Horizon Europe program. The study outlines the research motivation, project objectives, methodological approach, and organizational structure. It highlights the specific tasks, deliverables, focus areas, and key considerations that guide the project. Particular attention is given to the experimental methods employed to generate high-quality data aimed at filling critical knowledge gaps and supporting the development of a comprehensive emissions database. This database, a primary deliverable of the project, serves as the foundation for evidence-based policy recommendations. Preliminary results are also presented, including examples of the ratio of secondary aerosol (SecA) formation to primary PM mass emissions. Early findings indicate that SecA formation from exhaust emissions is strongly influenced by several technology-related factors, such as fuel type and the configuration of exhaust aftertreatment systems.