rapid transit (MRT), KTM Komuter, ERL's airport rail links and a monorail have been developed. Most of these systems have gone through extensive expansion as a superproject. The Klang Valley Integrated Transit System, as of now, is currently being upgraded to include a new MRT line and LRT line, as well as a monorail serving Putrajaya. Buses that operate around Klang Valley are also extensive. See also 1998 Klang Valley water crisis Greater Kuala Lumpur Kuala Lumpur List of metropolitan areas in Asia by population Public Transport in Klang Valley References Klang River Valleys of Malaysia K Landforms of Selangor Peninsular Malaysia