ME6- Models for rail traffic emission factors

Project leader: Ulf Olofsson
Graduate student: Minghui Tu
Graduate student: Yingying Cha (CSC)
Researcher: Anna Hedlund
Research Engineer: Peter Carlsson

The project focus is on particle emission factors from rail traffic.

The aim of the project is to develop emission factors for their different sources in rail traffic. These emission
factors should be integrated in to simulation models that can be used to predict the amount of particle emissions from different driving conditions. The effective density of aerosols in railway tunnels has been analyzed.

The air quality in the new opened Citybanan has been studied before and after its opening. One study on the air quality levels on the platforms is published in Aerosol and Air Quality Research. A further study on the air quality inside the train, driver and passenger cabins is published in Environmental Research. A third study model study on how the train frequence and the number of braking events affect the airborne particle emission levels in tunnels is published in Transportation research part D.

A data mining approach has been performed, in which the technical reports, unpublished Swedish reports, on the air quality of the Stockholm Metro system. Together with SLL has measurement stations for air quality been established on the red line in the Stockholm Underground system.

Yingying Cha defended her thesis on September 28, 2018.