Network Rail

Asset Data Extraction and Topographic Surveying – Signalling - Compliance Date: 4 March 2017
 N NR/L3/TRK/3104 ISSUE 2

Annotation

This Network Rail standard specifies the provision of Signalling asset data for use when changes to the location or arrangement of the trackside signalling assets or renewals of the Signalling system are to be undertaken.

It covers the development, design, construction, testing and commissioning of Signalling assets on the Network Rail infrastructure. Also access to the data is via existing data repositories where the validity of the data is known. Where the validity is uncertain, the survey methodologies specified in this standard apply.

This document includes the collection of data from existing, non video, sources and applies only to topographic surveys associated with the introduction or relocation of trackside signalling assets, since correlation of wiring, etc. and other surveys are covered by other processes and standards.

The scope may include the creation of new data from several sources That may include a topographic survey but not in every case.

It does not include the capture of data from on train video surveys, although the accuracies of these are rapidly improving and are the most efficient.

GRD016, Signalling Asset Survey Data Specification defines the format of the data to be delivered by the survey for use within Signalling project development and design, e.g. production of scheme plans.

The ongoing configuration management of the “as-is” Signalling asset data is outside of the scope of this standard.

This standard supports the general Level 2 survey standard NR/L2/TRK/3100, Topographic, Engineering, Land and Measured building surveying – Strategy and general (as given in Figure 1), particularly in the need to set out a Project Survey Strategy.