scope:

This document provides installation, test and maintenance details for the TASS system as developed by ALSTOM for use on Network Rail infrastructure in order to ensure that the functionality and ongoing requirements are understood.

Consideration is given to the following installations:-

• New or Revised Installation (Signal Works Testing Procedure).

• Missing, Broken or Faulty Installation (Signal Maintenance Testing Procedure).

• Like for Like Replacement. (Signal Maintenance Testing Procedure).

The track-based infrastructure requirements can be summarised.

Purpose

This specification defines the installation, test and maintenance requirements for the trackbased equipment associated with the Tilt Authorisation and Speed Supervision (TASS) system developed to deliver the principal requirements of Railway Group Standards GE/RT8012 'Controlling The Speed Of Tilting Trains Through Curves' and GE/RT8019 'Tilting Trains: Controlling Tilt Systems To Maintain Clearances'. This specification covers the following aspects of the system:-

• TASS track-based equipment installation processes with descriptions of the balise assembly.

• TASS balise assembly identification and labelling requirements.

• The TASS Balise Positioning Form and Balise Testing Form records.

• TASS track-based equipment commissioning.

• TASS track-based equipment maintenance, faulting and replacement requirements.