US Railroad General Code of Operating Rules (GCOR) Practice Test 2026 - Free GCOR Practice Questions and Study Guide

Question: 1 / 400

What does the End OS Sign indicate?

Start of the power-assisted switch circuit

End of the OS circuit area for a power-assisted switch

The End OS Sign indicates the End of the OS circuit area for a power-assisted switch. This sign is crucial for train operators and maintenance personnel, as it marks the boundary where the power-assisted circuitry ends. This information is vital for ensuring proper operations and safety around switches that are electrically controlled.

In scenarios where power-assisted switches are in use, understanding the delineation of circuit areas helps prevent accidents or malfunctions due to misunderstandings about the switch's operational status. By identifying the endpoint of these electrical circuits, crew members can take the necessary precautions and operate within the designated safe areas.

Proper knowledge and recognition of the End OS Sign are fundamental in maintaining order and safety within the rail system, ensuring that switches are used effectively and minimizing the risk of accidents.

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Clearing point for manual switches

Emergency stop point for all trains

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