Personally speaking this;
Could it be possible on how its drivable that its due to there being Multiple ride tracks that you can choose?
Take for instance, in the ride vehicle; theres a certain individual that drives the track, but then theres three other guests that collects power-ups and weapons to move faster or to cause issues for other cars.
The driver has a touch screen that allows him/her to at certain points, move left or right. That way, that driver chooses at that certain times of the attraction on going on different experiences.
And if that driver doesn't choose, then possibly it chooses for them?
Its just a brief idea; but if were personally talking about drivable cars, I think its possible that they'll go within that route.