Under the CLEAR programme, RSSB has established new emission factors for rail. The work helps to improve our understanding by providing an updated and more accurate picture on the emissions rates of different train types. The new data has been incorporated into the National Atmospheric Emissions Inventory (NAEI) and London Atmospheric Emissions Inventory (LAEI).

As part of the T1186 project, an online mapping tool has been developed visualising the emissions across the GB rail network, incorporating the updated emission factors from T1187 as well as the latest rail activity data available from Network Rail live data feeds. 

Initial trials of dispersion modelling software have also been carried out to understand the impact of emissions from rail on local air quality.