What is the route pairing number for the Airport Line?

The Airport Line is assigned the route pairing number of 4, which is crucial for operational efficiency and helps in the identification of schedules, conductors, and train management processes. This specific number is part of SEPTA's operational strategy, allowing for clear communication and coordination among various lines and services.

In the context of train operations, each route pairing number serves as a systematic way to categorize and reference different lines, ensuring that conductors and other personnel can easily understand their assignments and the particular routes they will be servicing on any given day. Therefore, knowing that the Airport Line is designated as number 4 can aid both new trainees and experienced conductors in navigating and managing their responsibilities effectively.