Zombie Invasion

You drive to Maine. Luckily the car you are driving is a Prius with a 40-gallon gas tank [weird], so you don't need to refuel. When you get to Maine, you come across a giant wall. The guard explains you you that the state of Maine is the only place entirely free of zombies, and intends to stay that way. They check you for bites, then allow you in. Maine looks even better than the rest of the world did before the zombie invasion. The wall stretches all the way around Maine, to keep the zombies out. Apparently scientists have concluded that in two years, all of the zombies will have desintegrated, and it will be safe to go and populate the world. Congratulations, you survived.