 The MX3000 is a three @-@ car electric multiple unit built exclusively for the Oslo Metro by Siemens in Vienna , Austria . The units are designed by Porsche Design Studio , and have a body in aluminum . A three @-@ car train is 54 @.@ 14 meters ( 177 ft 7 in ) long ; the end cars are 18 @.@ 11 meters ( 59 ft 5 in ) long each , while the center car is 17 @.@ 92 meters ( 58 ft 10 in ) long . The cars are 3 @.@ 16 meters ( 10 ft 4 in ) wide and 3 @.@ 68 meters ( 12 @.@ 1 ft ) tall . An empty three @-@ car unit weighs 98 tonnes ( 96 long tons ; 108 short tons ) , while it with full payload weighs 147 tonnes ( 145 long tons ; 162 short tons ) . 
