Using an 81W bus tracker is an excellent way to plan your trip in Chicago, Illinois. This bus service has 49 stops, and departure times start at 5:28 AM and end at 10:28 PM. The bus runs every day, and the route map will show you exactly when the bus will arrive at each stop. It can also help you get directions to the bus stop. The 81W bus tracker can be very helpful if you’re unfamiliar with the area and are looking for a convenient way to travel around.