Road traffic is a key source of air pollution in the West Midlands; in particular it is the dominant source of NO₂.  Current approaches use emissions factors, which suffer from a lack of accuracy in comparison to real world vehicle behaviour. Emissions factors also largely disregard driver behaviour.  On road real world emissions measurements using EDAR technology has been identified as producing information of particular value in formulating policy. 

WM-Air and its partners will apply research to assess real world vehicle-by-vehicle emissions within the West Midlands and develop new, acceleration based emission factors which will allow the impacts of driver behaviour to be more realistically considered.