Alright guys, I've got a little theory here that sort of links in with this.
Alright, assuming that the fog is some "time-travel" type of material or whatever and also the fact that J. Zielinski basically confirmed that the map is some type of clock and also based off of that Richtofen talks about this not being a "sprint" but a "marathon" (which is 26 miles) and also that the map is supposedly 2 miles in length (the bus route anyways):
What if you can go around the map 13 times (13 * 2(miles) = 26 miles (marathon)) [maybe with a certain condition], you might be able to turn day into night because of going through the fog (time-travel stuff) so much, it just messes with it or something. And if that doesn't work, maybe walking around 13 times may do it due to the fact that the fog doesn't actually touch you in the bus. (even though the bus is sort of like a TARDIS here)
Any thoughts?