11-30-2019, 12:50 PM
(11-29-2019, 07:29 PM)kps Wrote:(11-29-2019, 05:49 PM)ijmorlan Wrote: It is not believable that the TPSS and associated infrastructure couldn’t co-exist with a tunnel. But if the design of the TPSS doesn’t protect for the tunnel, it ends up putting cable vaults or whatever right where the tunnel needs to go.
I recall reading (probably somewhere deep in the Ion topic) that Metrolinx specifies a minimum width for pedestrian tunnels that is greater than the remaining space.
That’s what I’m getting at. The TPSS didn’t need to be exactly where it is, down to the centimetre. The electrical vaults didn’t need to be exactly where they are. And so on.
By designing the tunnel and the TPSS together, they could have both been fit into the space. Maybe the tunnel would go under the TPSS. Maybe the TPSS would shift over a bit compared to where it is. Maybe something else. Bottom line is, it’s not believable, in this case, that a good design couldn’t have been found.
It’s entirely believable that putting in a tunnel around the TPSS infrastructure that has already been installed would be difficult or even impossible.