Transit has ingeniously developed a method to predict a rider’s location and ETA in underground tunnels without relying on GPS. Thanks to the brilliant work of Étienne, Ayser, Jonathan, and Luc, their technology uses a phone’s vibration signature to track a rider’s movement on a moving train. By gathering data from various trips and training their motion classifier, Transit can now accurately determine if someone is on a moving train underground. This groundbreaking technology allows riders to navigate the subway system with ease, even in areas with poor cell service. Give it a try on the Transit app and say goodbye to unreliable GPS tracking!
https://blog.transitapp.com/go-underground/