Webcta bus tracker uses gps devices to report bus location data (and more) back to our servers. We can then, in real time, show you where buses are on a map and estimate. Webcta bus tracker uses gps devices to report bus location data (and more) back to our cta servers. We can then, in real time, show you where buses are on a map and. Webwelcome to cta bus tracker. Webinformation about cta bus and train service in and around chicago. Find maps, schedules, service alerts, plan a trip…