I live in an apartment in the US midwest, and during the winter my pipes freeze unless I trickle my faucet. I think that the point at which it freezes is in a difficult-to-access exterior wall on the second floor, significantly downstream of my water shutoff.
So I was wondering: If I shut off my running water when I'm not using it (and if I'm correct about the above), could I possibly prevent the pipe from freezing? Are there obvious negative consequences that this could have (other than convenience)?
Obviously I would need to double-check that this wouldn't cut off anyone else's water.
Edit: If I want to do this, I believe that I need to be very certain that there will not be a freeze upstream of my shutoff, because this could exacerbate the damage caused by the upstream freeze.
(Related question here)