(the largest suspended network). Monorail systems are most frequently implemented in large cities, airports, and theme parks.

Early monorail experiments date to the 1820s, with the first load-bearing systems appearing in the late 19th century. Modern mass-transit monorails emerged in the second half of the 20th century, principally in Japan, where Tokyo Monorail has carried over 1.5 billion passengers since 1964. Chongqing Rail Transit in China operates