❓ The question seeks to identify Public Transport Authority assets operating beyond their intended design life, aiming to understand the extent of this practice and its potential implications.

I refer to public transport in WA, and I ask:(a) are any Public Transport Authority fleet or rollingstock assets still in active passenger service past their original intended design life;(b) if yes to (a), which assets; and(c) for each asset in (b), what was the original design life in years and by how many years has the design life been exceeded?