Safety Issue
The unrestricted speed of train 3AB6 on a relatively hot day
provided sufficient dynamic force to cause the track, with its
diminished stability, to misalign.
The current imposition of precautionary temperature-related
speed restrictions recognises maximum temperature extremes but does
not allow for a situation where daily temperature variations
(minimum to maximum) are significant.
Safety Recommendation
The Australian Transport Safety Bureau recommends that the
Australian Rail Track Corporation takes further action to address
this safety issue.