Train order operation
Train order operation was a system that required minimum human overhead in an era before widespread use of technology-based automation.To this day, many short lines, heritage railways, and railroad museums continue to use Train Order operation.Timetable and train order operation was widely used on North American railroads that had a single main track with periodic passing sidings.On single track rail lines, the timetable specifies (explicitly or implicitly) the points at which two trains would meet and pass.[3] With the advent of radio communications, timetable and train order operation began to fall out of favor as DTC and CTC became more common on major carriers.CTC enabled dispatchers to set up meets remotely and allowed trains to proceed entirely on signal indication.Some train-order signals had three positions: Train orders were issued by the dispatcher responsible for the portion of railroad concerned.As each operator correctly repeated the order, the dispatcher would give a complete time, along with the initials of the designated railroad official for that territory.
Isleta, New Mexicofixed signalscab signallingcentralized traffic controldirect traffic controltrack warrantstrain dispatcherstimetableoverheadautomationpassing sidingsright of waysingle trackelectric telegraphErie RailroadAmerican Civil Wartelephonetwo-way radiotrack warrant controlsidingstationonionskinSalem, IllinoisTrans-Australian RailwayAutomatic block signalingProcedural controlRailway signallingBlock systemsAbsolute block signallingCommunications-based train controlEuropean Train Control SystemMoving blockRadio Electronic Token BlockSignalling controlBlock postIntegrated Electronic Control CentreInterlockingLever frameRail operating centreSolid State InterlockingWestlock InterlockingSignalsApplication of railway signalsNorth American railroad signalsRailway semaphore signalAxle counterTrack circuitTrack circuit interrupterTreadleTrain protectionAdvanced Civil Speed Enforcement SystemAutomatic train controlAutomatic train operationAutomatic train protectionAutomatic Train Protection (United Kingdom)Automatic train stopAutomatic Warning SystemAutomatische treinbeïnvloedingBaliseCatch pointsChinese Train Control SystemCityflo 650 CBTCContinuous Automatic Warning SystemContrôle de vitesse par balisesEBICABIntegra-SignumInteroperable Communications Based SignalingCrocodileKorean Train Control SystemLinienzugbeeinflussungPositive Train ControlPulse code cab signalingPunktförmige ZugbeeinflussungRS4 CodiciSelTracSistema Controllo Marcia TrenoSlide fenceTrain automatic stopping controllerTrain Protection & Warning SystemTrain stopTrainguard MTTransmission balise-locomotiveTransmission voie-machineLevel crossing signalsCrossbuckWigwagE-signalWayside hornAdtranzAlstomAŽD PrahaFederalGeneral ElectricGriswoldHitachiHyundai RotemMagneticProgress RailSafetranSiemensSmith and YardleyThalesUnion SwitchWestinghouse Brake & SignalWestinghouse Rail SystemsTransport CanadaAustraliaBavariaBelgiumCanadaFinlandFranceGermanyGreeceNetherlandsNew ZealandNorth AmericaNorwayPolandSwedenSwitzerlandThailandUnited Kingdom