Sun Tran provides a service that improves air quality in our community by taking cars off our busy streets and uses cleaner burning fuels to operate their fleet. Now, as part of Sun Tran's dedication to becoming the City of Tucson's first "green" transit facility, solar bus canopies are shading the expanding fleet of 250 buses. This is not the first time SunTran has chosen to harness the power of the sun. Throughout the Tucson community, bus shelters utilize solar powered lights to reduce the amount of energy used to provide safe and well-lit waiting areas for passengers.