Being in Switzerland it looks to me like this is a really tough referendum. Both sides have very good arguments and from the side it looks like either way the Switzerland has to give up some asoects of its high quality of life. If the initiative succeeds, Switzerland will get a large hit from the cancelation of a lot of bilateral agreements with the EU. If the population exceeds 10M then the current rail and road inf…
ETCS level 2 can increase rail capacity by orders of magnitude without laying any new track. You can have multiple trains following each other separated by stopping distance instead of having to separate trains between trackside signals.
You could get ride of the smaller train , only allowing big city to survive or decrease the commodity traffic or increase the rail network or increase the train station (more tracks allowing to overtake there, and have bigger trains) There is no easy solution otherwise it would have been done.