Rail safety issues and actions
Track geometry standards
Issue number: | RO-2016-002-SI-04 |
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Who it affects: | Owners and operators of passenger rail services in Victoria |
Issue owner: | Metro Trains Melbourne |
Transport function: | Rail: Passenger - metropolitan |
Background: | Investigation Report RO-2016-002 |
Issue release date: | 16 May 2018 |
Current issue status: | Safety action pending |
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Issue status justification: | The safety action taken by MTM in combination with other actions pertaining to track maintenance should reduce risk associated with the safety issue. |
Safety issue description
The network’s track geometry standards were probably unsuitable for small-radius Broad-Gauge curves. A combination of track geometry irregularities had increased the probability of flange-climb at several locations on the small-radius Rushall curve.
Proactive Action
Action number: | RO-2016-002-NSA-006 |
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Action organisation: | Metro Trains Melbourne (MTM) |
Date: | 16 May 2018 |
Action status: | Monitor |
Metro Trains Melbourne (MTM) has undertaken to review, and update as required, its network maintenance standards applied to small-radius curves and specifically maintenance tolerances on those geometric irregularities that increase the probability of flange-climb derailment.
Additional correspondence
Response date: | 31 August 2018 |
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Response from: | Metro Trains Melbourne |
Action status: | Monitor |
Response text: | Modelling to update geometry tolerences MTM is examining using modelling to simulate the risk of flange-climb derailment for different track geometry conditions on small-radius curves, and the potential for this modelling to support an informed revision of track geometry tolerances. |