Date Time Full steam ahead for UniSA’s train software app Almost 40 years ago, Peter Pudney was riding the trains between Gawler and Adelaide, working on a simple algorithm to help drivers keep time and reduce their energy use. A master’s student at the-then South Australian Institute of Technology (SAIT), the software he helped develop would count the number of times the wheels on a train went around to calculate where it was on a trip. Today, GPS has replaced manual wheel counts and the algorithm – refined and honed over four decades – now runs in the cabs of 8,000 passenger, freight, and heavy haul trains on four continents.