While we're on the subject of Day X/2 Me - I'm going to assume this is saying "Day times over to me", think what you will, but that seems to make the most sense to me.
Now that was an interesting connection between Porters X2 Ray Gun and the sign, perhaps that has something to do with it all? Has anyone every tried anything with that ray gun and the sign? I don't think CoDZ would happen stance call the ray gun X2 with that kind of coincidence so I think it might be linked.
Next point of business, the sign, while all of us are talking about that one sign, I don't think we're talking about the fact that there are in fact TWO signs that say the same thing; one as you enter the tunnel from the diner, and one as you enter the tunnel from the metro station. Now I'm not suggesting that the transition in bus routes has to happen in between those two signs, but come on... Maybe? But that leaves me with the thought: where would that bus go if the transition was made in between tunnels? Perhaps it would bust through a wall like a Kool-Aid commercial on to the second route? So many questions...