The table shows London was the first city to opened the underground railway systems (in 18
63), while Los Angeles has the newest underground railway systems which was opened in 2001
. The railway systems in the rest of cities systems were all opened in the 20th century.T
he longest route was for London (394 km), whereas the figures for the rest of cities were
all below 200 km ,especially Kyoto and Los Angeles only 11 km and xx km respectively. Bec
ause the route in London has the oldest history, the route was longest.The annual passenge
rs of the six cities was diverse. Tokyo has more passengers per year (1927 km) than other
cities which were followed by Pairs (1911km). Whereas Kyoto and Los Angeles have only 45
passengers respectively. The open date was proportional to the length of route, the
annual passengers' figures were not relevant from both opened date and the length of the
route.