Interesting paper detailing different scenarios related to the impacts of various forms of road transportation on health in London, England.
TRANSPORT AND HEALTH IN LONDON http://www.london.gov.uk/sites/default/files/Transport%20and%20health%20in%20London_March%202014.pdf The main impacts of London road transport on health http://www.london.gov.uk/sites/default/files/Transport%20and%20health%20in%20London_March%202014.pdf