Look up DarKoster and Pantheon as Busch Gardens Williamsburg, Both have switch tracks that go past and then switch. In the case of Darkoster, there are actually two one at the beginning and one towards the end. Basically putting the station between the 2 switch tracks which then allows the coaster to make a "second circuit" along most of the rest of the track for a longer ride, but a very compact footprint. In the case of Pantheon, they have it set to go forward through the curve, then backwards through the straight and then forwards again through the same straight section. It is considered a multi-launch coaster and very very fun.