The provisions of §§ 7.421-7.432 (relating to single and double reversible aerial tramways) apply to that class of aerial tramways in which the carriers reciprocate between the terminals, particularly those referred to as single reversible ("to and fro") tramways and double reversible ("jigback") tramways. Such tramways may be either monocable or bicable.
34 Pa. Code § 7.422
This section cited in 34 Pa. Code § 7.421 (relating to definitions); and 34 Pa. Code § 7.431 (relating to signs).