There is no national standard or system for railroad signaling in North America. Individual railroad corporations are free to devise their own signaling systems as long as they uphold some basic regulated safety requirements.

Railway signalling (BE), or railroad signaling (AE), is a system used to control the movement of railway traffic. Trains move on fixed rails, making them uniquely susceptible to collision.

Any operator in the US who wants to run trains over 79 mi/hr has to have some sort of automatic train stop (ATS), automatic train control (ATC) or cab signalling system (CSS). These names all mean that the driver gets some type of in-cab indication and a warning of signal conditions.

2023年1月19日 · In simple terms, railway signalling is a system of traffic lights for trains. Safety rules permit only one train on a specific section of track at any one time to keep the trains from colliding.

2020年7月24日 · In North America, there are two general categories of signaling used by Class I Railroads: speed signaling and route signaling. The types basically do exactly what it says on the cover: speed signaling tells the engineer how fast to go, and route signaling tells the enginer what route the train is lined for.

2023年7月21日 · There is more to railroad wayside signals than simply "green means go, red means stop." Here are a few concepts.

2025年3月17日 · Railroad signals are a form of communication designed to inform the train crew, particularly the engine crew, of track conditions ahead and to tell it how to operate the train. Methods of controlling train operations evolved over many years of trial and error.

The purpose of signalling systems is to ensure safe movements of trains on a railway infra-structure by locking movable track elements in a proper position, checking the clearance of track sections, locking out conflicting moves, and control train movements in a …

2025年1月23日 · Modern rail signal systems are one of the most complex and critical aspects of railway infrastructure. In this Q&A, four of EXP’s rail signaling experts share their perspectives on the evolution, challenges and innovations shaping today’s train control systems.

The aim of this document is to give the reader a overview of the basic types of North American railroad signal systems. The examples used in this document are generic, and many variations exist. Eventually separate documents on the different types will be written. Corrections, comments and suggestions for further updates are welcome.