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Westpac Geographical Interlocking - Mk IIIA - Testing

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.

10 Days
Derby or at your Premises by arrangement
Maximum number of delegates: 


This course is intended for staff to gain an in-depth knowledge of this type of circuitry with respect to Works Testing.

Key Features

  • Underpinning knowledge of the system.
  • Detailed understanding of the processes.
  • Practical fault finding exercises.

Course Outcomes

On successful completion of this course, the delegate will be able to perform signal works testing of the system in the following areas:

  • System Construction and Wiring
  • Levels of route
  • Selection
  • Calling
  • Locking
  • Aspects
  • Releasing
  • Panel Indications
  • Bi-directional Working
  • Overlaps
  • Restricted Aspects
  • Flank Protection
  • Preceding Shunt Signals

Assessment and Certification

Achievement of the Course Outcomes will be assessed by a practical and theory assessment to demonstrate the underpinning knowledge gained.

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.


It would be helpful if delegate have a good knowledge of general signalling principles and circuitry.