Passenger cars today are around ten times cleaner than there were 15 years ago. One effective way to combat air pollution is therefore to ensure a maximum proportion of clean, modern cars on the road. This study analyses the share of local motorway traffic and background sources in NO2 and PM10 levels at nine locations near major Dutch motorways, broken down by vehicle category and year of registration. This was done for four different policy scenarios, including the government’s latest package of measures, and three time horizons: 2004, 2010 and 2015. The results provide a basis for developing and selecting effective measures that make use of the ‘hidden potential’ of the current vehicle fleet – a ‘source of inspiration’.
This study was carried out for the Dutch Air Quality Innovation Programme (IPL) being implemented by the Road and Hydraulic Engineering department of Rijkswaterstaat for the Ministries of Transport, Public Works and Water Management and Housing, Spatial Planning and the Environment.