encyclopedia

OFF PEAK

Also called “Base Period” or “Normal Hours.” Period between the morning and evening peak periods when travel activity is generally lower and less frequent transit service is scheduled. Also see Base Period.

OFF ROUTE

An out-of-service prescribed route that buses follow to get from one location on the line to either (1) another location on the same line, or (2) another location on a foreign line.

OFF-LINE

Not in the main flow of traffic or not on the main line of traffic, for example, off-line station. (TRB)

OFF-LINE STATION

A station at which a transit unit (vehicle or train) stops outside of the main track or travel line so that other units can pass while passengers board or alight. (TRB)

OFF-QUADRANT

The location at a rail crossing, from the perspective of an approaching motorist, on the far side of the tracks and same side of the roadway. Warning devices are typically absent in the off-quadrant

OFF-STREET TERMINAL

A transit terminal or turnaround point for transit vehicles that is located away from other vehicular traffic. (TRB)

OFFICE OF MANAGEMENT AND BUDGET

Metro department that develops and coordinates the agency budget activities.

OFFICIAL DIVISION CLOCK

Clock located in Yard Control which is synchronized with the Central Control Facility (CCF) at 0300 hours daily.

OFFSET

1. In transit operations, the amount of time (system-wide) that the train control computer has added into the theoretical schedule to maintain proper train sequencing, scheduled connections, and headways. 2. In traffic operations, the time difference between traffic signals as…