Korean Railway Safety Act (6): Everything About Railway Signals, Hand Signals, and Markers

Introduction: Silent Conversation on Tracks: The World of Signals

Railways are spaces where tens of thousands of tons of trains run at hundreds of kilometers per hour. Since you cannot stop immediately like stepping on a car’s brake, ‘Signals’ that inform the situation in advance from a much further distance are the alpha and omega of railway safety. In railways, a signal is not just an arrangement of light, but a strict ‘Language’ that grants operation rights and guarantees safety.

Today, we will summarize three elements that are promises on the tracks: Signals, Hand Signals, and Markers/Signs.

1. Signals: Instructing Operating Conditions to Trains

Signals instruct operating conditions (Proceed, Stop, Caution, etc.) to trains using machines or instruments.

Color Light Signal: The most common signal, providing instructions with the color of light.
- Green (Proceed): Can operate at the prescribed speed.
- Yellow (Caution): Predicts that the next signal is a stop signal or requires slow speed.
- Red (Stop): Must stop in front of the signal.
In-cab Signal: Signals that appear on monitors or instrument panels inside the train driver’s cab. Mainly used in high-speed trains or urban railways.
Priority of Signals: If ground signals and in-cab signals differ, priority is determined by system design, but the principle is usually to follow the safer side (Stop or Low speed).

2. Hand Signals: Signals Between People

Hand signals are for station staff, guides, or personnel to communicate intentions using flags, lanterns, or gestures.

Departure Hand Signal: A signal that the station master informs the driver that the train is ready to depart.
Induction Hand Signal: Used when drawing a train to a specific location.
Shunting Hand Signal: Signals exchanged between the driver and workers during shunting (connecting or disconnecting vehicles).
Emergency Hand Signal: An emergency signal to stop immediately upon discovery of an accident or obstruction. (At night, largely swing a red lantern.)

3. Markers and Signs: Informing Specific Locations or States

Rather than giving ‘instructions’ like signals or hand signals, markers are fixed facilities that provide ‘Information’ the driver should reference.

Stop Position Marker: Informs at which point on the platform the train should stop. (Differs depending on train length, e.g., 8 cars, 10 cars)
Acceleration/Deceleration Sign: Informs that speed can be increased or decreased depending on the gradient or curves of the track.
Insulated Section Marker: Informs the beginning and end of a section where electricity is not supplied to the overhead lines. (A critical point where the driver must cut off power.)
Horn Sign: Informs that a horn should be sounded at crossings or work points.

4. Principles of Signal Observation

Observing a signal is as important as its meaning.

Point-and-Call (Shisa Kanko): A procedure of pointing with eyes, shouting with mouth, and confirming with brain, such as “Signal proceed!”, “Stop confirmed!”.
Prevention of Signal Misidentification: When several signals are side by side, your train’s signal must be accurately identified.

Conclusion: Seeing is the Start of Safety

Railway signals and markers are milestones on the tracks. Only when this silent conversation is perfectly understood does a driver qualify to control a massive machine carrying thousands of passengers.

A Solid Foundation: Study the meaning of each signal and the actions of hand signals by drawing them. Especially, distinguishing between ‘main signals’ and ‘subsidiary signals’ is key to understanding the hierarchy of rail systems. Signals are lifelines. If you engrave the meaning of each beyond just the text, your understanding of the industry’s technical rigor will deepen.

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