Quote:
Originally Posted by chowhou
Excavating around an existing tunnel is also a nightmare scenario, and Forbes is like >5% grade my man. It's not a feasible route.
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Errecting pillars adjacent to a tunnel is simpler than excavating an entire street somewhere to do cut and cover or tunnel boring. And Forbes is at 4.5%, skytrain is good at higher grades, and being elevated, it can be designed to be more elevated at Esplanade and shorter at Forbes to lower the grade further. I'm just saying there should be something in mind for this when they rebuild, than write it off entirely because a hill is steep.