Which line does NOT share a route pairing with the Norristown Line?

The Warminster Line does not share a route pairing with the Norristown Line, primarily due to its distinct operational route and service area. The Norristown Line operates between Norristown and the Schuylkill River region, while the Warminster Line runs through a separate corridor in the northern suburbs of Philadelphia, heading towards Warminster.

In contrast, the Wilmington/Newark Line, Media/Elwyn Line, and Cynwyd Line all have connections or shared service elements with the Norristown Line due to overlapping commuter travel patterns or joint service arrangements. Understanding these route pairings and the specific geographies they service is essential for professionals in the transit industry, as it helps in effective scheduling and resource allocation.