What designation is used for trains that are Not in passenger service?

The designation used for trains that are not in passenger service is represented by the letter C. This classification is important for understanding the operational status of a train. Trains designated with C typically indicate that they are engaged in freight transport, maintenance, or other non-passenger-related activities.

In many train systems, specific letters are assigned to convey the operational status of a train succinctly. Designating a train with a specific letter helps ensure clear communication among operators, conductors, and those managing the schedule and logistics of train movement. Understanding such designations helps in maintaining safety and operational efficiency in railway systems.