scope:

This specification applies to all ballasted track (other than that specifically designed for a particular purpose, e.g. on structures or where clearance restrictions dictate that alternatives shall be used). It applies to routine track renewals and remodelling schemes.

This specification does not apply to new lines.

Purpose

This specification gives recommendations for managing investigation, design and installation of trackbed treatments on Network Rail's permanent way. Background information is provided where relevant.

It also sets out the methodology for categorisation of spent ballast, based on risk assessment and chemical analysis, prior to removal and delivery to the Local Distribution Centre.