A spotlight on social infrastructure; The rise of digital twins; Long-term strategies for Australian rail; Cross River Rail's transformational legacy; Protecting rail bearings against electrical current; Recycled plastic railway sleepers: a sustainable alternative to timber?; Inland Rail skills academy to create opportunities for regional Australia; Delivering speech intelligibility with digital PA systems; A new era for Australia's airports; Western Sydney Airport - a new approach to Sydney; Constructing Taxiway Zulu; Landscaping and vegetation management; How to better manage better critical assets; Protecting critical infrastructure against cyber risk; The missing piece in the IoT puzzle; Environmental monitoring network making Latrobe Valley safer; Sydney Harbour Bridge's laser cleaning technology; Disaster Management 2019.