AJBD, Le Clercq G., Fayolle D., Etat de l’art sur les péages urbains : objectifs recherchés, dispositifs mis en œuvre et impacts sur la qualité de l’air, ADEME, , 70 p. (lire en ligne)
(en) « The Impact of the Congestion Charging Scheme on Air Quality in London », sur healtheffects.org, : « Ultimately, the Review Committee concluded that the investigators, despite their considerable effort to study the impact of the London CCS, were unable to demonstrate a clear effect of the CCS either on individual air pollutant concentrations or on the oxidative potential of PM10. »
