Safety issue
| Safety issue description |
The ASB rule NWT 308 and procedure NPR 703 did not provide sufficient description for the task of using protecting signals for an alternative route. (Safety issue) |
|---|---|
| Issue number | RO-2019-018-SI-01 |
| Issue owner | Sydney Trains |
| Transport function | Network Operations |
| Issue status | Closed – Adequately addressed |
| Date issue released | 20/12/2021 |
| Issue status justification |
Network Rules changes brought in December 2020 prohibit the clearing of the absolute controlled signal immediately protecting the worksite. |
Safety action
| Action type | Proactive action |
|---|---|
| Action number | RO-2019-018-NSA-01 |
| Organisation | Sydney Trains |
| Action description |
Sydney Trains has introduced changes to the network rules and procedures for Absolute Signal Blocking that prohibit the clearing of the signal immediately protecting the worksite in order to run a train using an alternative route. These changes were introduced in December 2020. The ATSB considers this safety action as adequate to manage the risk of a signal being cleared and inadvertently allowing a train into a worksite when using an alternative route. |
| Action status | Closed |