  The link between transport related emissions and human health is a major
issue for city municipalities worldwide. PM emissions from exhaust and
non-exhaust sources are one of the main worrying contributors to air-pollution.
In this paper, we challenge the notion that a ban on internal combustion engine
vehicles will result in clean and safe air in our cities, since emissions from
tyres and other non-exhaust sources are expected to increase in the near
future. To this end, we present data from the city of Dublin that document that
the current amount of tyre-related PM emissions in the city might already be
above or close to the levels deemed safe by the World Health Organization. As a
solution to this problem, we present a feedback-enabled distributed access
control mechanism and ride-sharing scheme to limit the number of vehicles in a
city and therefore maintain the amount of transport-related PM to safe levels.

Systems and Control;Computers and Society;Systems and Control