Dublin has received an extra 20 buses under the 34.4 billion Transport 21 project to create a fully integrated travel system for the Irish capital and outlying areas. The new buses, which will start operating on the Quality Bus corridors in January, will be slightly longer than existing double-deckers and will have 20 per cent more capacity. Transport 21 will see the creation of two metro lines, an underground station at St Stephen's Green integrating all services and the Western Rail Corridor. It also includes new commuter rail services for Cork City and Galway City, DART extensions in Dublin, and a new road route connecting Donegal to Galway, Limerick, Cork and Waterford, known as the Atlantic Corridor.