The tunnel entrance/exit is a wee bit to the left of where Inn Deep is
https://maps.app.goo.gl/KyJhq5zgeTg1S7wA8
It *would* mean getting rid of the park pathway that's closest to the river, at least until the tram line could join Kelvin Way via one of the bridges. So I imagine it'd face some opposition. I think it'd be worth it though.