Road transport is a major contributor to climate change, accounting for over a quarter of road transport CO2 emissions. The European Commission proposes to revise the legislation setting CO2 emission standards for new heavy-duty vehicles in the EU. The proposed revision would expand the scope of the existing regulation to include urban buses, coaches, trailers and other types of lorries. It will also require that the average CO2 emissions of heavy-duty vehicles, would have to fall by 45 % from 2030, by 65 % from 2035, and by 90 % from 2040 onwards, compared with 2019 levels.