13.The Act enables local traffic authorities outside London to introduce road user charges and workplace parking levies to help tackle congestion as part of a local transport plan and requires spending of revenues on measures for improving local transport. It also allows for joint schemes, including ones involving London authorities. It also enables the Secretary of State, and the National Assembly for Wales (“NAW”), to introduce charges on trunk roads complementary to a local authority charging scheme, at the request of the local authority. The Secretary of State and the National Assembly for Wales also have the power to charge on trunk road bridges and tunnels of at least 600 metres in length.