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2025 | OriginalPaper | Chapter

2. Transmission-Based Signaling

Author : Juan Moreno García-Loygorri

Published in: Telecommunication Systems for Modern Railways

Publisher: Springer Nature Switzerland

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Abstract

This chapter provides a comprehensive exploration of transmission-based signaling (TBS) systems, which are crucial for modern railway operations. It begins by contrasting non-transmission-based signaling systems with TBS, setting the stage for an in-depth look at the European Rail Traffic Management System (ERTMS) and communications-based train control (CBTC). These systems are the cornerstone of high-speed and urban railway networks, respectively, offering enhanced safety and efficiency. The chapter delves into the various grades of automation, from manual operation to fully autonomous trains, highlighting the technological and operational advancements that enable these levels. It also examines the role of operational control centers (OCCs) in managing these complex systems, ensuring seamless and safe railway operations. The chapter concludes with a discussion on the future of railway signaling, emphasizing the ongoing evolution towards more automated and interconnected systems. Readers will gain a deep understanding of the technical and operational aspects of TBS, making this chapter an essential resource for anyone involved in railway signaling and train control.
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previous chapter Introduction to Railways
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Appendix
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Footnotes
1
Needs several redundancies, long testing time, and complexity will skyrocket, making such a system unmanageable and not very practical.
 
2
Extrapolates a speed curve based on both the punctual speed limits sent by the ground systems and the brake curve of the train. Notice that the brake profile of the train depends heavily on the load it has. That is the reason why modern trains sense the load to adapt the brake force to it.
 
3
Some trains have a handle to limit speed up to a certain value. This is useful for maneuvers in depots, like coupling trains (for example, up to 3 km/h to avoid damages in the couplers) or limiting speed in depots up to 20 km/h. These systems sometimes must be selected by the driver and sometimes not.
 
4
For example, Lille Metro Line 1 in 1982 had no CBTC and was the first metro line in the world to be fully automated. Some versions say that the first one was Port Liner in Kobe (Japan) 1 year earlier. We take no sides in this war, because neither of them needed a CBTC system to be fully automated.
 
5
99.999% is usually referred as “five nines”, too.
 
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Metadata
Title
Transmission-Based Signaling
Author
Juan Moreno García-Loygorri
Copyright Year
2025
Book
Telecommunication Systems for Modern Railways

Print ISBN: 978-3-031-82246-9

Electronic ISBN: 978-3-031-82247-6

Copyright Year: 2025

DOI
https://doi.org/10.1007/978-3-031-82247-6_2