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

Bespoke & Private Courses: 
  • Location: At our Derby training centre, or on your premises subject to eqiupment specifically required for this event.
5 days
At our Derby Training Centre or at your premises (subject to course requirements)
Maximum number of delegates: 


The universal forms of control tables used in the past have now been complemented by a set specific to Computer Based Interlockings (CBI), including Solid State Interlocking (SSI) Westlock® and Smartlock®.


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

Key Features

  • Course fully up to date to reflect the latest standards for CBI interlocking and control tables.
  • The course discusses sufficient interlocking principles and CBI 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 CBI 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.