The destination is not pre-determined and depends on the vehicle you chose.

Everyone start at the geographical center of the United States in Lebanon, Kansas and later statistically most likely find themselves on one of the coasts. Just because of the overall direction of the highways.

Ended up in Anchorage once. Must say rural Canadian craigslist is wild.

Are you saying the car picks random options at each intersection?

Not quite. Initially, it gets general direction, say the West Coast. Then, depending on vehicle choice, it has a list of preferred waypoint categories. After arriving to a waypoint it makes a decision where to go next.

For example, if you picked a camper van, your next stop may be a gas station (for snacks), after that it may decide to head for an RV-park, then for some natural attraction and so on.