[Metro-One]

That would definitely be an issue that would need to be addressed / worked around.

This line would (will...) be very expensive so it will likely need to be elevated for much of its run along Hastings, nearly the entirety of Willingdon (only maybe short tunneled sections into downtown Metrotown and maybe downtown Brentwood to help reduce the grade) and for good sections of North Vancouver (maybe tunneled near Lonsdale).