scope:

This business process defines the approval process to be adopted in respect of all Signalling Schemes that make alterations or otherwise impact on the functionality of signaling installations on Network Rail Managed infrastructure.

The process is to be applied to all Works affecting Network Rail Signalling and level crossing infrastructure. The Network Rail Designated Project Engineer (defined in NR/L2/RSE/02009) is responsible for application of this process. The requirement for approval of signalling schemes including any signalling arrangements associated with level crossing protection, applies to all projects which make alterations to Network Rail signalling installations irrespective of what organisation or disciplineis sponsoring the works.

Purpose

This business process delivers signalling schemes that are consistent in interpretation and application of principles across the Network. The application of this business process gives a level of assurance that the signalling proposal any signalling arrangements associated with level crossing protection is fit for purpose.

This review process also forms part of the Safety Verification Process, as required by the ROGS regulations or NTSNs(as appropriate). This business process supports the requirements of company standards particularly those relating to the signalling design process in NR/L2/SIG11201.