+44 (0) 1332 343585

Route Relay Interlocking Design (RRIDO)

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
At our Derby training centre, or on your premises (subject to equipment availability)
Maximum number of delegates: 


This course is intended for the signal designer who is working towards the principles designer’s role.

Key Features

  • The route relay interlocking technology is the universal basis of all interlocking principles and control tables, such that this course is valuable even if the delegate is not intending to work on RRI technology
  • Closely links the standard circuits to signalling principles and control tables
  • Completely updated to reflect current requirements
  • Relay names and technical jargon are explained in “plain english” terminology
  • Underpinning Knowledge matched to IRSE Licence requirements
  • Extensive practical exercises reinforce learning of circuit application
  • Delegates will benefit from practice on our working route relay interlocking

Course Outcomes

On successful completion of this course, the delegate will be able to describe the function of, and create site specific designs for, the following classes of circuitry.

  • Push Button Interlocking
  • Route Interlocking
  • Points Interlocking and interfaces
  • Sectional Route Locking
  • Signal Controls
  • Route Normalisation
  • Indications

Assessment and Certification

Achievement of the Course Outcomes will be assessed by a theory assessment of circuit principles, and a practical assessment of typical circuit customisation skills.

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 layout plans, signalling control tables and circuit diagrams.