This is the bridge that the BC government referenced in the pdf.
Norway's Hardanger Bridge. It's 1400 metres long, with 2 vehicle lanes and a pedestrian/bike lane.
Imagine two of these to cross Howe Sound:
From:
http://www.byggutengrenser.no/inspirasjon/hardangerbrua
From:
https://en.wikipedia.org/wiki/Hardanger_Bridge