Rail transportation in the Greater Manila Area is a major part of the transportation system in Metro Manila and its surrounding areas. It consists of the Manila Light Rail Transit System, Manila Metro Rail Transit System, and the PNR Metro Commuter Line. The network makes up the majority of active railways in the country and bear the brunt of providing the metropolis with rail as a faster alternative mode of transport other than buses and jeepneys. However, these systems are currently insufficient for the rapidly expanding metropolis; to address this, new lines and line extensions are under construction, which will extend the system far out into neighboring regions.