Can I make my nether tunnel work in unloaded chunks?

I'm working on a nether tunnel which allows you to travel by minecart as well as by ice road by having pistons extend and retract:

Minecart mode:

Ice road mode:

I've got 2 stations at the beginning and the end of the tunnel where I can see if the player walks or takes the minecart by having the tunnel in ice road mode unless the player uses a button to call the minecart at the station.

However redstone does not work inside chunks that are not loaded by the game. Therefor I cannot use this for really long tunnels (which is something I would like to do though)

Is there a way arround that?