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Intermediate Signalling Technology Control Tables for SSI (ISTCT - SSI)

Bespoke & Private Courses: 

Signet Solutions can reserve a course for your Company exclusively, and we can design courses to meet your Company’s specifications. Please contact us to discuss your requirements.

5 Days
Derby or your site by arrangement
Maximum number of delegates: 


The universal forms of control tables traditionally used in the “Signalling Control Tables” course have now been complemented by a set specific to SSI interlockings.


This course will enable a designer, who is already familiar with general signalling principles, to be able to complete the new SSI control tables.

Key Features

  • Course fully up to date to reflect NR/L3/SIG/11202 March 2009 issue
  • The course discusses sufficient interlocking principles and SSI functional principles to enable the box entries to be properly understood.
  • Technical jargon is explained in clear English terms

Course Outcomes

On successful completion of this course, the delegate will be able to:

  • Demonstrate an understanding of SSI interlocking principles
  • Complete Control Tables for Sub Route, Point and Signal Route & Aspect
  • Design Sub Route and Approach Locking Map Search Diagrams

Assessment and Certification

Achievement of the Course Outcomes will be assessed by a theory assessment of interlocking principles and control table creation.


The delegate’s achievement of the Course Outcomes will be confirmed by a certificate which will be forwarded to the nominated client contact following the course.


A well prepared delegate is expected to be able to interpret signalling plans for UK main line signalling installations.