Reviewing use of temporary block working and emergency special working
Project number:
2023-STN-012
Keeping trains moving with efficiency during signal failures and planned work
'This work provides a much better, simpler, and safe way to manage our railway for our customers.'
The challenge
The rail industry is seeking to reduce the use of detonators and the exposure of railway staff to the live railway. Temporary block working (TBW) remained in the Rule Book as a method of keeping trains moving during planned signalling work. TBW requires the use of detonators and handsignallers at the entrance and exit signals.
Industry also acknowledged that adverse incidents had occurred during the previous use of ESW. We were requested to review the previous use of emergency special working (ESW) and TBW, with the aim of introducing a single method of operation for moving trains during planned signalling work of failures.
What we did
TBW has been removed from the Rule Book, and a review of the use of ESW since its introduction in 2018 was undertaken.
Using the information from this review, as well as the output of industry workshops and surveys of operational staff, the rules related to ESW have been updated. Also, the method of operation has been renamed to extended block working (EBW). These rules clarify the location of the exit signal used during EBW.
Improvements have been made to form ‘NR3190 Extended Block Working Ticket’. This is to assist the driver in identifying the exit signal and reduce the workload for the signaller and driver. The updated rules were developed and trialled with the support of passenger and freight operating companies, Network Rail, and Trade Unions.
Benefits delivered
This work will assist the industry in reducing the use of detonators and the exposure of staff to the live railway. EBW will enable trains to continue to be moved safely in degraded situations.
Operational staff will use a single method of operation during planned work and unplanned signalling failures, reducing the amount of learning required. Form NR3190 has been updated to clarify the contents and reduce the workload of the driver and the signaller.
These changes could reduce overall system risk by reducing how often trains become stranded. The changes could save industry £1.1 million over 5 years.