The first Georgia_Viaduct was supposed to have 2 active streetcar tracks in the middle. Unfortunately, no one in authority was around to make sure that the viaduct would be strong enough to support fully loaded streetcars, as well as trucks and cars. So, it was just for cars and trucks.
https://www2.laiwanette.net/fountain/project/georgia-viaduct-archive
https://www.reddit.com/r/vancouver/comments/10a4f31/tbt_downtown_georgia_viaduct_october_5_1957
The Burrard_Bridge was also suppose to have 2 streetcar tracks, but in typical Vancouver style, it never happened.
https://viewpointvancouver.ca/2017/10/02/burrard-bridge-1934when-motordom-reigned-supreme/
The original configuration of the BB had a 6 lane top deck and a provision for 2 streetcar or tram-train tracks on a lower level.
https://viewpointvancouver.ca/2017/10/04/burrard-bridge-always-controversial/
Given the backward Vancouver planning mentality, a 2 level bridge was like something out of a Sci-Fi movie. Thus, a lower level crossing was never completed.
https://vancouversun.com/news/metro/vancouvers-viaducts-were-built-in-anticipation-of-a-freeway-that-never-happened The freeways plans between the 1950s and 1970s would have meant clearing various swaths of land through the city.
https://www.vancouverisawesome.com/history/georgia-viaduct-1915-1933837
https://placesthatmatter.ca/location/georgia-st-viaduct/
https://viewpointvancouver.ca/2009/02/08/tear-down-that-viaduct
https://viewpointvancouver.ca/2015/01/13/john-mackie-the-georgia-viaduct-and-the-freeway-fight-1972
https://scoutmagazine.ca/vancouver-lexicon-grandview-cut After the official cancelation of the freeway, the viaducts should have continued in the form of 2 express bus lanes into the Grandview Cut.
https://www.facebook.com/elevationrailway/videos/climbing-the-grandview-cut/10153022444271781/
https://www.tiktok.com/@uncouver/video/7234753547152133381 By the mid 1970s, the Grandview Cut should have been upgraded to being double tracked. That would have made it easier for the flow of freight trains, Amtrack and a future commuter train to and from Abbotsford and the Lower Fraser Valley.
https://globalnews.ca/news/3701535/bc-hydro-proposed-new-cycling-and-pedestrian-bridge-for-grandview-cut Not only should the Grandview Cut have been double tracked, but have 2 rapid bus lanes and 2 bike lanes and footpaths.
https://www.facebook.com/groups/128486813979056/posts/1106138719547189/
https://vancouver.ca/home-property-development/streetscape-design.aspx
Vancouver just had to be one of the first cities to get rid of its streetcars and interurban tram-trains. It will likely be one of the last cities to reinstate some of its streetcar lines.