"Other world-class cities have used satellite-based tracking systems for more than a decade to inform waiting passengers exactly when their bus or train will arrive."
Chicago is piloting a GPS based bus tracking system in an effort to try to minimize the up to 1hr+ wait time that can occur between busses. Finally!!! Even if it doesn't improve time, it will at least let you know when you should leave the house/office/whatever to avoid a long wait in the blistering cold!!!