The Lacey_V._Murrow_Memorial_Bridge opened in 1940 with 4 lanes. Once the Homer_M._Hadley_Memorial_Bridge opened in 1989, the Lacey_V._Murrow_Memorial_Bridge could be renovated. This was all part of a plan to have an 8 lane crossing with 2 train tracks.
The Samuel-De_Champlain_Bridge in Montreal opened in 2019. https://en.wikipedia.org/wiki/Samuel-De_Champlain_Bridge#Specifications
Vancouver might eventually try to have its own version of train & highway bridge to the North Shore. However, what's straightforward for Seattle & Montreal is difficult to accomplish in backwards Vancouver.
However, it takes a long time to get things done in BC. At least an 8 lane crossing with 2 train tracks should have been built there decades ago, but there is such a reluctance to think & build big in Vancouver.
https://vancouver.citynews.ca/2023/05/18/ironworkers-memorial-replacement-bc-transit/
https://dailyhive.com/vancouver/north-shore-skytrain-burrard-inlet-rapid-transit-brt-lrt-study
https://dailyhive.com/vancouver/upper-levels-highway-north-shore-upgrades-study
https://dailyhive.com/vancouver/north-shore-rapid-transit-study-skytrain
