https://www.reddit.com/r/vancouver/comments/1slv8lc/early_spring_mornings_in_the_port_of_vancouver
While several cities around the world have highway and railway tunnels under their harbors or rivers, Vancouver is very late to the party.
Burrard Inlet Rapid Transit Study lists crossing options https://news.gov.bc.ca/releases/2020TRAN0144-001729
Third Auto-oriented Crossing of Burrard Inlet https://council.vancouver.ca/010313/tt2.htm