Before revision: There are mainly two types of traverse: Closed traverse: either originates from a station and returns to the same station completing a circuit, or runs between two known stations Open traverse: neither returns to its starting station, nor closes on any other known station.
After revision: 250px|Diagram of an open traverseThere are mainly two types of traverse: Closed traverse: either originates from a station and returns to the same station completing a circuit, or runs between two known stations Open traverse: neither returns to its starting station, nor closes on any other known station.