Homepage of Jörn Pachl

E-Book: Railway Signalling Principles

Pachl, J.: Railway Signalling Principles. Braunschweig 2020, 83 p.

DOI: 10.24355/dbbs.084-202110181429-0

Free Download (PDF)

Only by this download link, you get intermediate updates of the current edition!

Latest version: Edition 2.0 (October 2021)

This tutorial E-book is based on the long-standing experience of teaching railway operations and signalling at TU Braunschweig and other universities and higher vocational training institutions in different parts of the world. It explains the fundamental principles all railway signalling systems have in common. This is done in a generic way that does not focus on specific national solutions. It covers basic elements and terms, principles for safe train separation, interlocking principles, automatic train protection, and level crossing protection. It also contains a glossary with definitions of relevant terms.


1 Basic Elements and Terms
2 Spacing Trains
3 Interlocking Principles
4 Automatic Train Protection
5 Level Crossings

This book is used as a student tutorial for railway programs at these academic and higher vocational training institutions:

  • Technische Universiät Braunschweig, Germany
  • Beijing Jiaotong University, China
  • Mahidol University Bangkok, Thailand
  • University of Zagreb, Croatia
  • Siemens Rail Automation Academy at Braunschweig, Germany
  • Accenture Industrial Software Solutions, Cluj-Napoca, Romania

Homepage of Jörn Pachl