Hall of Infinite Doors

You decide the bike is the safest way and hop on. You head off toward Shelbyville, still in shock at the deserted town. Pretty soon you come upon the highway and set a good fast pace.

You come to a crossroads and to the left is Shelbyville, to the right the sign points to a town called Jasper. Jasper is larger than Shelbyville, but is 20 miles further. What do you do?