IT-Security in Railway Signalling Systems

2014 ◽  
pp. 56-64
Author(s):  
Christian Schlehuber ◽  
Erik Tews ◽  
Stefan Katzenbeisser
Keyword(s):  
It Security ◽  
Railway Signalling ◽  
Signalling Systems

scholarly journals A refinement-based development of a distributed signalling system

2021 ◽  
Author(s):  
Paulius Stankaitis ◽  
Alexei Iliasov ◽  
Tsutomu Kobayashi ◽  
Yamine Aït-Ameur ◽  
Fuyuki Ishikawa ◽  
...  
Keyword(s):  
Model Verification ◽  
Modelling Language ◽  
Distributed Protocol ◽  
Rigorous Approach ◽  
Railway Systems ◽  
Main Challenge ◽  
Stepwise Development ◽  
Railway Signalling ◽  
High Level ◽  
Signalling Systems

AbstractThe decentralised railway signalling systems have a potential to increase capacity, availability and reduce maintenance costs of railway networks. However, given the safety-critical nature of railway signalling and the complexity of novel distributed signalling solutions, their safety should be guaranteed by using thorough system validation methods. To achieve such a high-level of safety assurance of these complex signalling systems, scenario-based testing methods are far from being sufficient despite that they are still widely used in the industry. Formal verification is an alternative approach which provides a rigorous approach to verifying complex systems and has been successfully used in the railway domain. Despite the successes, little work has been done in applying formal methods for distributed railway systems. In our research we are working towards a multifaceted formal development methodology of complex railway signalling systems. The methodology is based on the Event-B modelling language which provides an expressive modelling language, a stepwise development and a proof-based model verification. In this paper, we present the application of the methodology for the development and verification of a distributed protocol for reservation of railway sections. The main challenge of this work is developing a distributed protocol which ensures safety and liveness of the distributed railway system when message delays are allowed in the model.

Information Logistics for Maintenance of Railway Signalling Systems: A Case Study

2013 ◽  
Vol 2 (2) ◽  
pp. 97-112
Author(s):  
A. Morant ◽  
R. Karim ◽  
P.-O. Larsson-Kråik
Keyword(s):  
Information Logistics ◽  
Railway Signalling ◽  
Signalling Systems

scholarly journals AGUSTIN DE BETANCOURT AS CREATOR OF OPTICAL TELEGRAPH MACHINE USED ON THE FIRST EUROPEAN RAILWAY LINES AND PRECURSOR OF RAILWAY SIGNALLING SYSTEMS

2021 ◽  
Vol 7 (4) ◽  
pp. 631-644
Author(s):  
S. V. Vlasenko ◽  
◽  
S. A. Sushkov ◽  
S. V. Grishechko ◽  
◽  
...  
Keyword(s):  
Data Transmission ◽  
Human Vision ◽  
Railway Transport ◽  
Transmission Systems ◽  
Signaling Systems ◽  
Mechanical Signals ◽  
Mechanical Signal ◽  
Railway Signalling ◽  
Mechanical Devices ◽  
Signalling Systems

The origin of signalling principles, their purpose and development since the 4th century BC are described. Claude Chappe' s research on the peculiarities of human vision and the rationale for the choice of colors for the optical telegraph are presented. These principles are used in modern rail and road signaling systems with slight modifi cations to refl ect the development of technology. The transmission apparatus and the Claude Chappe alphabet are presented, documentary examples of its use in France are proposed, and the main disadvantages of this principle of data transmission are indicated. Further in the article, an alternative principle of data transmission using a single semaphore wing in an optical telegraph is presented. It was developed and introduced in 1798 between Madrid and Cadiz (Spain) by Agustin de Betancourt. The article shows the diagrams of the optical telegraph apparatus of Agustin de Betancourt, and also gives its comparison with fi rst mechanical signals used in railway transport. With references to historical documents and evidence, the evolution of the optical telegraph by Agustin de Betancourt from data transmission systems between cities to systems for the exchange of information between neighboring railway posts and stations on the fi rst railway lines is presented. The evolution of the telegraph from mechanical devices announcing the train approach to the railway post to the signals for train drivers thanks to the change of wing position is shown. As a transitional stage from mechanical to electrical signals in railway transport, the principle of operation of semaphores with kerosene lamps lit at night with light fi lters mechanically connected to the position of the wing is explained. Based on development of mechanical signals, the historical reasons for signal aspect with two lamps in diff erent modern signalling systems are presented. The article opens a new, previously little-known page of the activities by Agustin de Betancourt, who was not only the fi rst rector of the fi rst transport high school in Russia but also one of developers of data transmission systems used optical telegraph. His inventions such as mechanical signal with one wing are using in improved form in railway signalling systems up today.

The Policy of applying RAMS to evaluate Railway Signalling Systems for reliable Transportation

2011 ◽  
pp. 55-63 ◽  
Author(s):  
Kazue Yasuoka ◽  
Atsushi Watabe ◽  
Tetsunori Hattori ◽  
Masayuki Matsumoto
Keyword(s):  
Railway Signalling ◽  
Signalling Systems
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