The T, based in Fort Worth, offers regular bus service, express bus service, and Rider Request service covering Fort Worth and Richland Hills. The Trinity Railway Express (TRE) links a 35-mile corridor from T&P Station and Fort Worth ITC in downtown Fort Worth to Union Station in downtown Dallas. Stations in between include Richland Hills, Hurst/Bell, Centreport/DFW Airport, West Irving, South Irving, Medical/Market Center, and Victory Station. The airport's free Remote South shuttle bus service provides continuous connections between the station and airline terminals. You must have valid fare media to board the train - a monthly or annual pass, valid transfer slip (T Service Area Only), E PASS, or validated ticket/day pass. Fares are based on where you board and depart, not how far you travel. The fare zone boundary is between West Irving Station and CentrePort/DFW Airport Station. Be sure to check the fare category (local, premium, or reduced) to make sure the fare media you use is valid for the zones of travel you need to cross. Ticket Vending Machines (TVMs) are located on all station platforms.