encyclopedia

OPEN CUT GUIDEWAY

A guideway below the prevailing surface of the terrain in a trenchlike excavation (cut). (TRB)

OPEN RUN (EXTRA RUN)

A run that is put into effect after other runs have been assigned and that normally will be assigned from the extra board until the next picking of runs or will be put up for bid by seniority. (TRB)

Open-Loop Braking

Unmodulated braking without feedback control from the train control system. (TRB)

OPERATING ASSISTANCE

Financial assistance for transit operating expenses (not capital costs); such aid may originate with federal, local or state governments.

OPERATING BUDGET

Funds allocated for normal MTA operations, such as employee salaries, rentals, power and fuel.

OPERATING CHARACTERISTICS

Those quantitative, measurable parameters pertinent to a specific system, subsystem, device or component that provide definition of performance.

OPERATING COSTS

All annual costs, including salaries, maintenance of equipment, supplies, and administrative expenses. They include amortization of buses, but not rapid transit vehicles and fixed facilities.

OPERATING EXPENSE

Monies paid in salaries, wages, materials, supplies and equipment in order to maintain equipment and buildings, operate vehicles, rent equipment and facilities and settle claims.

OPERATING MODES (HEAVY RAIL)

The Heavy Rail Operating Modes are: * Automatic Train Operation (ATO), a subsystem within Automatic Train Control (ATC), which automatically regulates train speed, performs programmed station stopping and is subordinate to Automatic Train Protection (ATP). * Emergency Manual Operation (EMO),…