The South East England Regional Assembly's transport board is considering an express network across the region. It is focusing on two schemes on the Sussex coast and in the Thames Valley.
The board has agreed that it will try to persuade more people to leave cars at home and use public transport. It backed proposals under the South East Plan to promote "smarter travel behaviour".
Plans to improve rail links to buses and park-and-ride schemes, as outlined in this summer's white paper, were agreed. Other measures include a single ticket for bus, train and parking fees and the creation of a resource centre to build good practice and research.
Assembly chairman Keith Mitchell said: "Travelling more wisely is what the future is about. Changing our behaviour is challenging, so we need better access to better public transport, encouraging communities to be more sustainable."