I would prefer somebody from Glasgow who knows the city being able to tell me the viability of the idea and perhap make suggestions to me than somebody who is just being a contrarian for the sake of it.
Whilst I’m not from Glasgow, I do know it rather well. And I’m certainly not being contrarian for the sake of it. I am, perhaps somewhat grumpy at present, so please let me say sorry for that!
You suggested before that serious consideration should be given to using central reservations, or elevated sections, to extend the subway. Others have explained why extending the subway is not a good idea.
On the point of central reservations, realistically there are only two in Glasgow that are wide enough for even a small railway as per the subway, at ground level:
Great Western Rd from Anniesland to just past the Kilbowie roundabout. Most of that route is paralleled by the existing Singer line.
Edinburgh Road from Carnytne to Baillieston, parallel to the Aidrie line.
Both would be up against the issue of severing one side of the road from the other.
Building new, elevated, local transport systems in urban areas is something this country has, rightly, avoided doing for a century or so.
The point is I'm trying to proactively look at ways to expand the subway
I suppose my point is / was: what is the problem you are trying to solve?
If it is “to improve public transport in greater Glasgow in a way that delivers good value for money for Glasgow residents and taxpayers”, there are many possible answers, of which extending the subway (by any means other than more tunnelling) is rather near the bottom the list.