Based on the New York City Subway, the subway in Liberty City in Grand Theft Auto IV, signed as LTA Rail, is a heavy rail rapid transit system that serves a large portion of the city. With 26 and 8 routes, it is the largest and most complex rapid transit system in the Grand Theft Auto Universe. The system is operated by the Liberty Transport Authority (LTA). The subway also appears in Grand Theft Auto: Chinatown Wars; it is inaccessible to the player, yet trains still run. About 65% of the network is underground, with the remaining 35% being overground. No platforms on the entire system are staggered and there are also no ground level stations or tracks in the entire system, except for the depot. The subway system does not carry over into Alderney.