https://www.youtube.com/watch?v=jabSGw2M4tA
Seattle's New Light Rail On a FLOATING BRIDGE https://www.youtube.com/watch?v=vmh5uVguIlM
Seattle's Sound Transit just expanded their Link Light Rail system by running the 2 Line across a floating bridge https://www.youtube.com/watch?v=vmh5uVguIlM&t=2s
Seattle has a good extensive regional train system and its getting bigger and better.
Some years after Montreal and so many years after Perth, but still better than backwards Vancouver.
Perth Narrows_Bridge
https://en.wikipedia.org/wiki/Narrows_Bridge_(Perth)#Railway_bridge:_2005
https://commons.wikimedia.org/wiki/File:6_car_train_on_narrows.JPG
Unfortunately, all of these nice train and wide highway bridges aren't allowed in narrowminded Vancouver. A congestive transportation approach was implemented decades ago.