Unitrans is the name for the transit system which operates in Davis, California. It takes its name from an abbreviation of the wors "University Transport". Excepting several managerial and maintenance positions, Unitrans is managed and operated entirely by students of the University of California, Davis who usually work part-time while attending school. The system is well known throughout the area for its use of several distinctive ex-London Transport double decker buses, as well as its fleet of modern natural gas single-decks. Ridership exceeds 3 million passenger-trips per year on 16 weekday and 4 Saturday routes. Current (2007) fares are $1.00 for the general public and included in student fees for undergraduate University attendees. Unitrans is one of only four transit systems in the United States to operate double deck buses in regular (non-sightseeing) service (the others being The Deuce in Las Vegas, Nevada, Antelope Valley Transit Authority in Lancaster/Palmdale, California, and Community Transit in Snohomish County, Washington) and has one of the best safety records of any public transit system in the US.