NR NR/L2/OCS/098 ISSUE 2 PDF

This procedure applies to all instances where there is an intent to reduce the capability of any part of the infrastructure for a defined period of time as a consequence of reduced traffic levels. This includes loops and sidings. Proposals to reduce the capability permanently shall be managed by the normal Network Change process.

If a prospective SNC does affect existing traffic, so that compensation may be required, or the other conditions apply, then the full Network Change process shall be implemented.

SNCs shall fall into two categories:

a) Where traffic has ceased or is to cease over a section of the network and it is proposed to cease maintenance (except absolute minimum), or

b) Where traffic has or could have reduced infrastructure capability requirements such as route availability, speed, tonnage and train length and it is proposed to reduce maintenance.

If presented with a "Fragile Route" issue, this should be raised by the Territory Maintenance Manager (TMM), with the support of the Principal Route Planner (PRP), at the appropriate Route Strategy Planning Group.

Purpose

To define the process and responsibilities for management of Short-term Network Change (SNC) thus ensuring a consistent approach with appropriate consultation.

This SNC process is to be used when it is proposed to maintain a part of the Network at less than the current Published Capability, (as shown in the relevant Sectional Appendix) for a limited period, in response to potentially short-term reductions in traffic requirements. At the same time, train operators have the ability to request the reversal of this change should they require it to run traffic.

The SNC process is only to be applied where;

1. There is no effect on existing traffic (including ancillary movements) and hence compensation to Train Operations Companies (TOCs) shall not be appropriate and

2. There is evidence of strong prospects that traffic levels are forecast within a specified time period (normally not more than 2 years), to return to a level that shall require a return of capability to the current published level, and/or the route in question is of strategic importance as evidenced in the published Route Utilisation Strategy (RUS) and route plans.