encyclopedia

ON TIME PERFORMANCE

Performance measure for determining how well a train or bus keeps to schedule; usually refers to whether vehicles arrive at their terminals within five minutes of their scheduled arrival time and calculated as a percentage compared to the total number…

ON-LINE STATION

A station in which transit units (vehicles or trains) stop on the main track or travel lane. This is the common design, and term is used only to distinguish this station from off-line stations. (TRB)

ON-SCENE COORDINATOR (OSC)

First MTA rail employee to arrive at the scene of an accident/incident until relieved by a rail transit Operations Supervisor, who declares as ‘in-charge’ of the accident/incident for all Rail Operations response activities. The OSC is Rail Operations’ liaison with…

ONE-PIECE RUN

An operator’s daily work schedule for which the operator stays in the same transit unit (vehicle or train) without relief. It is usually about 8 hours long. (TRB)

ONE-WAY

One-way passenger trips are counted as each time a passenger trips person boards the vehicle so that a round trip would be counted as two passenger trips.