https://en.wikipedia.org/wiki/Skyline_(Honolulu)
https://en.wikipedia.org/wiki/Skyline_(Honolulu)#Route
https://en.wikipedia.org/wiki/Skyline_(Honolulu)#Rolling_stock "The line uses 256 ft (78 m) four-car train sets, each with the capacity to carry nearly 800 passengers,[229] similar in weight to heavy rail systems elsewhere in the United States (such as the Chicago 'L' in Chicago, Illinois)."
https://en.wikipedia.org/wiki/Hitachi_Rail_Italy_Driverless_Metro#Rolling_stock
Heavy and light rail train stations should always have the potential to be extended in order to accommodate longer trains.
Unfortunatly, backwards Vancouver did its damndest to not build long stations.