Combined track geometry irregularities including cyclic faults

In the case of Australian standards, the current track defect standards RISSB AS7635  or ARTC section 5 do not include definitions or limits of cyclic faults or combined faults.

It is well known and reported that such faults are often significant contributors to derailments, but it is not known how track maintenance criteria should be set.

This project will conduct analysis of combined and cyclic faults at magnitudes allowed by current standards for isolated faults. It is expected that new track defect limits for combined and cyclic faults will be justified from simulated wagon and locomotive response data.

The results of these analyses will be summarised in a “Combined Defect Table”.