• Sun Tran was established in 1975. A contest was held and the winning name was selected from entries submitted by members of the community.
• Currently, Sun Tran has more than 185 buses in its fleet.
• Each bus is 40 feet long, 10 feet high and just under 9 feet wide.
• A bus weighs 35,000 pounds and seats up to 40 passengers.
• Sun Tran was named America’s Best Transit System for 2005 and 1988, as well as Arizona’s Best Transit System for 2012 and 2004. Sun Tran Marketing took home the 2022 Tucson American Advertising Award for Best Integrated Advertising Campaign.
• Sun Tran buses travel more than 28,000 miles each day.
• Sun Tran serves nearly 2,200 bus stops.
• Sun Tran has more than 600 employees.
• Every bus is equipped with a bike rack that can carry up to three bicycles.
• Sun Tran ranked 27 out of 73 transit systems where the population is greater than 250,000.
• Over 99,000 jobs are accessible within a 30-minute transit commute on average for households.
• Over 209,200 jobs are located within a 1/2 mile of transit.

• If all Americans who currently ride the bus decided to drive, their cars would circle the globe with a line of traffic 23,000 miles long.
• Each Tucsonan traveling during peak hours wastes, on average, 42 hours a year –more than five full working days – in congestion.
• Approximately 60 percent of Pima County’s air pollution is caused by motor vehicle usage.
• 100 percent of Sun Tran’s fleet utilizes cleaner-burning fuels such as bio-diesel, compressed natural gas, and electric buses.
• Each year, public transportation use saves the U.S. the equivalent of 4.2 billion gallons of gasoline.
• In 2008, more than 10 billion trips were taken on public transportation, the highest in 50 years.
• Public transportation saves 37 million metric tons of carbon dioxide annually.

• Individuals who use public transportation save more than $9,000 every year.
• The average household spends 18 cents of every dollar on transportation, 94 percent of which is for buying, maintaining, and operating cars.
• Traffic congestion costs Americans $63.1 billion a year.
• The Federal Transit Administration reports that the 80 million Americans who live in transit-intensive metropolitan areas save an estimated $20 billion in auto expenses each year.

• 83 percent of older Americans say that public transit provides easy access to the things they need in everyday life.
• Public transportation is a vital link for the more than 51 million Americans with disabilities.
• 37 million individuals living at or below the poverty line often rely on public transportation because they are unable to afford their own vehicles.
• 10 million Americans use public transportation to get to work every day, with even more using transit on a less frequent basis.
• 100 percent of Sun Tran’s buses are equipped with ramps.
• Riding the bus is 170 times safer than traveling by car.

• 1905 – The Tucson Rapid Transit Company (TRT) bought the existing horse-drawn streetcar transit system in Tucson.
• 1906 – TRT began an electric streetcar system, ending a 25-year era of animal-powered public transit in Tucson.
• Mid-1920s – TRT recognized its existing streetcar system was not keeping pace with the needs of a growing town and added two bus routes.
• Transit pioneer, Roy Laos, began the Occidental Bus Line with one bus. This service provided a critical service to Tucson’s south side and his company expanded rapidly.
• 1931 – TRT replaced all electric streetcar routes with buses.
• 1936 – A third operator, Mountain View Bus Line, was established as demand for bus service grew.
• 1941 – Mountain View Bus Line struggled to survive and was bought out by TRT.
• 1945 – Seven million passengers were carried by TRT and Occidental Bus Line this year. Gas rationing during World War II caused ridership on Tucson’s bus companies to skyrocket. Rapid post-war growth followed, and the bus service continued to expand with larger, more modern buses.
• 1950s through 1960s – This was a period of steady decline in ridership, starting in the early 1950s due to labor strikes and increasing competition from the automobile industry.
• 1965 – Ridership had declined by 63 percent from the high in 1945.

• 1969 – The City of Tucson purchased Tucson Rapid Transit (TRT) and ridership grew dramatically. 65 new buses were purchased with the aid of federal grants. The frequency and length of existing routes were increased and new routes were added.
• 1975 – A contest ran in the newspaper to rename the system and the winning name, Sun Tran, was adopted.
• 1978 – Roy Laos’ bus company operating on the south and west sides of Tucson, was having trouble keeping pace with the new expansion of the city system. The public in these parts of town wanted additional services the company could not provide; Sun Tran purchased the company, and Tucson had a single public transit system.
• 1983 – To alleviate congestion problems, Sun Tran spearheaded the idea of several transit centers that would act as transportation hubs in Tucson.
• 1987– The first transit center, named after Roy Laos, was opened on Tucson’s south side.
• Sun Tran converted a 35-foot GMC bus to use both compressed natural gas and diesel fuel. This was one of the first of such buses in the country.
• 1988 – The American Public Transportation Association honored Sun Tran with its America’s Best Transit System Award.
• 1991– Ronstadt Transit Center opened in downtown Tucson.
• The City of Tucson opened a CNG-fueling station adjacent to Sun Tran (4220 S. Park Avenue), paving the way for the system’s fleet to be alternatively fueled.
• For the first time, Sun Tran purchased three dual-fuel buses.
• 1994 – Accommodating transit needs on Tucson’s booming northwest side, the Tohono Tadai Transit Center was completed. This was the first transit center in Arizona designed under the Americans with Disability Act (ADA) guidelines.
• 1996 – Electronic fareboxes were installed on all Sun Tran buses. During the six-month period following the introduction of the fareboxes, passenger revenue increased by 7 percent.
• 1999– Sun Tran completed installation of its Automated Vehicle Location (AVL) system allowing Sun Tran to track every bus while in service. This AVL system was integrated with Sun Tran’s new automated annunciator system, which also met ADA guidelines.
• Sun Tran made further advancements when Passenger Electronic Revenue Collector (PERC) units were added to its electronic fareboxes. This technology enabled Sun Tran to convert paper tickets and transfers to magnetic passes and transfers and allowed for the development of new products such as day passes.
• 2001– Digital video recorders were installed on most buses to enhance operator and passenger security.
• 2005 – Sun Tran was named America’s Best Transit System by the American Public Transportation Association.
• Sun Tran transitioned the bus fleet to 100 percent Gillig buses, creating a more efficient maintenance process by using only one manufacturer.
• 2006– Sun Tran received 50 new low-floor bio-diesel buses, to make 100 percent of the fleet utilizing cleaner-burning fuel and ADA accessible.
• Sun Tran’s maintenance facility was one of the first U.S. transit maintenance facilities to receive the Environmental Management System ISO 14001 certification recognizing Sun Tran’s capacity to maintain and improve upon its environmental performance.
• 2009- Sun Van’s fleet transitioned from diesel to gasoline, increasing efficiency for Sun Van vehicles.
• 2012– Sun Tran was named Arizona’s Best Transit System by the Arizona Transportation Association.
• Hybrid buses were put into service and utilized on Sun Tran bus routes.
• The Northwest Bus Maintenance Facility was completed at 3920 N. Sun Tran Blvd. The 25-acre facility was built in three phases:
  • Phase I
    • City of Tucson fleet fueling facility
    • Sun Tran Boulevard construction and infrastructure
  • Phase II – LEED Gold Certified
    • Operations building
    • Driver dispatch center
    • Maintenance building which consisted of 50 thousand square feet and 17 bus bays
    • Parking for 150 buses and a fueling station
  • Phase III – LEED Silver Cetified
    • Maintenance building, which includes now 95 thousand square feet of space, which is longer than a football field, 30 bus bays, body shop, paint booth, fuel storage, and additional bus wash bays.
    • Administration building: 27 thousand square feet of space built to house the regional center for transit operations
• 2013 – Sun Tran launched SunGO, the smart card fare payment technology designed to make transferring throughout the region easier. Valid on Sun Tran, Sun Express, Sun Shuttle and eventually the Sun Link Modern streetcar, SunGO provides many benefits to transit passengers.
• 2014 – Tucson introduced the Sun Link streetcar to the public, Tucson’s largest and most complex transportation construction project in the city’s history. Construction began in March 2012 and was substantially completed in just over 19 months. The 3.9-mile route connects restaurants, shops, and entertainment venues at Main Gate Square, 4th Avenue, Downtown, and Mercado San Agustin and educational and medical facilities at the University of Arizona.
• 2015 and 2016– Sun Tran and the City of Tucson established the Frequent Transit Network – a system of 11 routes that run every 15 minutes or less between 6 AM and 6 PM on weekdays.

Today, Sun Tran is managed by RATP Dev North America, and services approximately 15 million passenger trips annually to destinations in and around Tucson. Currently, 100 percent of the fleet utilizes Compressed Natural Gas, Biodiesel, electric and hybrid technologies.

• 2017– Sun Tran successfully negotiated a 3-year labor contract agreement without service interruptions. The new labor contract is in place through June 30, 2020.
• All existing Sun Tran bus stop signs were replaced with new signs that included the updated Sun Tran logo, the numbers of routes that serve each location, and a unique bus stop I.D. number allowing passengers to effectively use online trip planning and next bus arrival times.
• Sun Tran released the GoTucson Transit mobile app to give passengers the option to purchase transit fares from their smartphones.
• The City of Tucson Mayor & Council approved the Annual Pass and SummerGO Youth Pass program.
• 2018– Sun Tran purchased 23 new Compressed Natural Gas (CNG) buses to reduce harmful emissions, improve air quality, and lower the overall age of the fleet. The 40-foot Gillig CNG buses were introduced to service in August and replaced 23 older buses.
• Sun Tran installed driver safety partitions in 94 buses and security monitors in the new buses.
• The City of Tucson Mayor & Council approved the 3-Day Pass and $25 for $20 program.
• 2020 – Sun Tran, Sun Van, Sun Link, and Sun Shuttle went fare-free!
• Sun Van launched the door-to-door transportation, Sun On Demand.
• Sun Tran experienced a decrease in service as a result of the COVID-19 pandemic.
• 2023- Sun Tran conducted a Comprehensive Operational Analysis to develop a cost-neutral plan to ensure maximum efficiency of the transit system.
• 2024- Post-pandemic Sun Tran’s ridership recovered to exceed pre-pandemic ridership.