all fares are free since late March 2020 due to the ongoing COVID-19 outbreak up to further notice. Until driver shields are in place, all riders must board & alight at the rear doors. The basic fare is $1.75. Reduced fare for low-income, persons with disabilities, seniors at least 65 and Medicare cardholders is $0.75 (with a valid SunGO ID & card). The express bus fare is $2.35. No fares apply to kids under 6 with fare-paying rider, limit 3. All fares can be paid with a SunGo card, which utilises smart card technology, and can be loaded with cash value or passes. 24-hour passes ($4) & 30-day tickets ($48) are available. The University of Arizona provides discounted passes for eligible students, faculty and staff through the UA's Parking and Transportation Services. Fleet Current fleet Sun Tran has an active fleet of 237 buses. Retired Fleet Note that this is by no means a complete listing of retired vehicles that have operated for Sun Tran and/or its predecessors. Current Routes Sun Tran operates 29 regular routes and 13 express routes, as well as 10 Sun Shuttle routes, a neighborhood transit service. Most regular routes provide service from 6am to 11pm. A few routes provide service until midnight. Sun Tran does not provide overnight service. Regular Routes Express Routes Alternative propulsion For at least the next five years, Sun Tran will use more biodiesel buses. Biodiesel is a cleaner than regular diesel. Sun Tran plans to buy an additional 119 biodiesel buses over its five-year contract with bus manufacturer Gillig Corp. buses are also capable of running on regular diesel, but Sun Tran does not use petrodiesel in any of its buses. Sun Tran uses B20 and B5 biodiesel blends in its 114 biodiesel buses. It is believed that the increased use of biodiesel avoided a potential fare increase and fuel surcharge in July 2008. Customer service Sun Tran publishes a transit book, known as the Ride Guide, and it is updated twice yearly, on February and on August. It contains maps and schedules for all regular and express routes. Copies are available at multiple locations around town, including the Sun Tran offices, many public libraries, community colleges, major malls, pass sales outlets, at other civic facilities around the metropolitan area, and on the buses themselves. The Ride Guide is also available online at the Sun Tran website. Additionally, route schedules