five-car configurations due to an extra baggage car. Commuter Train cars have 50 longitudinal seats with two wheelchair areas and two luggage racks. Express Train cars are equipped with 54 seats with one wheelchair area and three luggage racks. Each train car has three doors per side except for baggage cars which have five doors per side; baggage cars have an onboard baggage handling system including control equipment. Fleet roster All trains have open-gangway connections. Engineering trains Taoyuan Metro uses a specialized fleet of engineering trains supplied by Hokuriku Heavy Industries for maintenance of way. Some of these trains include rail crane wagons, rail inspection vehicles, and 60-ton rescue locomotives. In April 2017, Taoyuan Metro borrowed an ultrasonic flaw detection vehicle from Taipei Metro to conduct comprehensive inspections on its rail tracks after a crack was discovered on a track point at the emergency halt between and . At that time, Taoyuan Metro only had a hand-pushed ultrasonic inspection device for such purposes. History A rail system to connect Taoyuan International Airport with existing transportation hubs was proposed as early as the 1980s and reemphasized over the years in government proclamations such as the New Ten Major Construction Projects. The metro route was originally planned to be constructed as a BOT project; in 1998, the project was auctioned to Evertransit International Development Corp. (), a subsidiary of Ever Fortune Industrial Co. (). However, the company failed to begin the construction, and in 2003, the government cancelled the contract. After the BOT project failed to go through, the Ministry of Transportation and Communications (MOTC) decided to build the line directly from the government budget. MOTC originally planned for the line to be transferred to the Taiwan Railway Administration (TRA) to operate; President Ma Ying-jeou had also proposed the Bureau of High Speed Rail (BOHSR) to operate the line with the Taipei Rapid Transit Corporation (TRTC) and the TRA. Later, the TRA announced they would not be able to operate the line so the MOTC asked TRTC to operate the line or have the Taoyuan City Government create the Taoyuan Rapid Transit Corporation to operate the line. Taipei terminus change and design The terminus in Taipei was originally planned for but was changed to Taipei Main Station to facilitate transfers to TRA, THSR, and Taipei Metro, as well as other transportation modes including bus services at the adjacent Taipei Bus Station. However,