A worlds first , years of research and development, quality...

A worlds first , years of research and development, quality screens, lengthy trials, proven systems and contracts in the Melbourne and Brisbane rail networks. They created the idea and got it out there before anyone else. I assume there is also patents to protect these designs . In my opinion, time and proven working systems is their greatest advantage. It has taken them many years to get to this point and IMO things are now just getting started.