The government has announced a raft of new measures aimed at reducing the level of carbon emissions from transport.
Ministers pledged £30 million of funding to help encourage "a radical shift" towards low-carbon travel and improve the air quality in some of the UK's biggest cities.
The plans, released by the Department for Transport, include £3.5 million to support the greater use of biogas for powering vehicles.
Ministers also pledged £3.5 million towards a low-carbon truck demonstration project designed to highlight the benefits of greener vehicles for freight operators.
An additional £5 million will go towards developing UK supply chains for low-carbon vehicles through the Technology Strategy Board's Low Carbon Vehicle Platform.
Transport secretary Andrew Adonis said: "These measures will not only help us to reduce emissions but also provide a sustainable and economically viable alternative to traditional carbon-based transport."
He added that the plans will also help Britain remain at the forefront of low-carbon technology and environmentally-friendly travel.
The announcement comes after chancellor Alistair Darling last week outlined plans to spend £285 million on UK motorways in a bid to free up capacity and ease congestion.
