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AH2029 Railway Signalling System 7.5 credits

This course provides insight into the signaling systems and equipment used for control and security of railway traffic. The course covers the requirements and conditions that are the basis for the railroad signal system. It also deals with both the components and complete systems to current and future signal systems are constructed.

Choose semester and course offering to see current information and more about the course, such as course syllabus, study period, and application information.

Headings with content from the Course syllabus AH2029 (Spring 2022–) are denoted with an asterisk ( )

Content and learning outcomes

Course disposition

The course consists totally of twelve days of lectures by the basic knowledge needed to understand the subject. This is supplemented with exercises, project assignments and field trips to provide applications on the subject. Examination is a written exam. The course can partly be read at a distance.

Course contents

  • General principles of railway control system
  • Consequenses in the society of a control system
  • Basic principles of interlocking
  • History
  • Legislation
  • Costs and expenditure
  • Lifetime
  • Standardisation
  • Different types of ATP-systems
  • The Swedish signaling system
  • Rail traffic capacity
  • Time tables
  • Signaling systems for mass transit systems

Intended learning outcomes

After the course the student shall be able to:

  • Explain the need of a signaling safety system for the railway
  • Explain the interaction between trains, railway and train traffic control centers
  • Describe the difference between current and future signaling systems
  • Explain the different design of a signaling system dependent on infrastructure
  • Dimension a reliable system for a railway line with mixed traffic to minimize energy consumption of train traffic
  • Calculate the cost of a designed signaling safety system
  • Describe the current law and regulations in the signaling safety system

Literature and preparations

Specific prerequisites

University studies at least 120 credits and Eng B/6 according to the Swedish upper secondary school system.

Recommended prerequisites

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Course compendium

Examination and completion

If the course is discontinued, students may request to be examined during the following two academic years.

Grading scale

A, B, C, D, E, FX, F


  • TEN1 - Examination, 7.5 credits, grading scale: A, B, C, D, E, FX, F

Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.

The examiner may apply another examination format when re-examining individual students.

TEN1 - Examination, 7.5 credits, grade scale: A, B, C, D, E, FX, F

Other requirements for final grade

A mandatory written examination equivalent to 7,5 cr with grading scale A-F

Opportunity to complete the requirements via supplementary examination

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Opportunity to raise an approved grade via renewed examination

No information inserted


Ethical approach

  • All members of a group are responsible for the group's work.
  • In any assessment, every student shall honestly disclose any help received and sources used.
  • In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.

Further information

Course room in Canvas

Registered students find further information about the implementation of the course in the course room in Canvas. A link to the course room can be found under the tab Studies in the Personal menu at the start of the course.

Offered by

Main field of study

This course does not belong to any Main field of study.

Education cycle

Second cycle

Add-on studies

  • AH2030 Railway Signalling System - Reliability”
  • AH2031 Railway Signalling System - Project Planning
  • AH202X Master Degree Project in Railway Operation


Anders Lindahl;