around stations, including: Zhongshan Metro Mall: – – (815 m, 81 shops). Taipei main station underground mall: on floor B1 of the station. Taipei New World Shopping Center: Between the metro and TRA sections of Taipei Station. Station front metro mall: West of Taipei main station, beneath Zhongxiao W Road. Taipei City Mall: Northwest of Taipei main station, beneath Zhengzhou Rd and Civic Blvd. East Metro Mall: Between and (825 m, 35 shops). Ximen Underground Mall: north of (currently used as an office building and library). Longshan Temple Underground Mall: north and south sides. Global Mall: floors B1 to 2F. As of 2008 there are 102 shops within the stations themselves. Transit Transfers to city bus stations are available at all metro stations. In 2009, transfer volume between the metro and bus systems reached 444,100 transfers per day (counting only EasyCard users). Connections to Taiwan Railway Administration and Taiwan High Speed Rail trains are available at , and . Connections to Taipei Bus Station and Taipei City Hall Bus Station are available at and stations, respectively. The Maokong Gondola is accessible from . Taipei Songshan Airport is served by the station. A metro system to connect Taipei to Taoyuan International Airport is also available since March 2017. Rolling stock All rolling stocks on the Taipei Metro are electric multiple units, powered by a third rail at 750 volts direct current. Each train is equipped with automatic train operation (ATO) for a partial or complete automatic train piloting and driverless functions. Medium-capacity trains The medium-capacity trains of are broad gauge rubber-tired trains with no onboard train operators but are operated remotely by the medium-capacity system operation control center. It initially used a fixed-block automatic train control (ATC) system. Each train consists of two 2-car electric multiple unit (EMU) sets, with a total of 4 cars. The Wenhu line is the only line of the system to not have open-gangway carriages, meaning that passengers cannot move between carriages when the train is moving. The was initially operated with VAL 256 trains cars, where two VAL 256 cars in the same set would share the same road number. As a result of this numbering scheme, the 102 cars of the VAL fleet have car numbers from 1 to 51. In June 2003, Bombardier was awarded a contract to supply the with 202 INNOVIA APM 256 train cars, to install the CITYFLO 650 moving-block