35-foot GM New Look buses from the San Diego Metropolitan Transit System. Three new 30-foot Gillig Phantoms were provided by UCD's Transportation and Parking Services (TAPS) for the intracampus and UCD Medical Center shuttle to be operated by Unitrans drivers (this service is now run by the Medical Center). Greater ridership in the 1980s prompted the writing and passing of a student referendum that added a $13 fee to registration costs to create the fare-less system. Students who paid their registration fees could ride the bus by simply showing their registration card with a valid registration sticker, or board for a cash fare of $0.50. This referendum made Unitrans an even more convenient method of transportation for students attending UC Davis. The 1990s saw Unitrans operating 13 routes, with yearly ridership expected to top 2 million in fiscal year 1997–98. The addition of 15 brand new natural gas powered Orion Mark V buses from Oriskany, New York allowed Unitrans to modernize and clean up by retiring the Flxible fleet and portions of the GM fleet. Around the same time two 40-foot Gillig Phantoms purchased from Yolobus were reborn as Unitrans buses (and yet two more were purchased for Yolobus in 2001 and 2005). In the late 1990s, the remainder of the GM fleet was retired, as were the two Daimlers and RTL1194, one of the first two double-deck buses purchased by Unitrans (although it hadn't operated in some time). One of the RT's that was also no longer in service by this time was ultimately sold in 2002. In 2000 the Unitrans maintenance shop completed its retrofit of RT2819 to use a brand-new John Deere natural-gas powered engine. This bus is believed to be the only one of its type in the world to be powered by such an engine. In 2001, Unitrans purchased 12 new natural gas powered Blue Bird Xcel 102 buses. Working with the University of California, Davis' Institute of Transportation Studies, one of the Blue Birds was slated to operate on a Hydrogen/CNG fuel blend, and was retired from service to begin work on the conversion. This bus was eventually introduced on April 20, 2004, when California Governor Arnold Schwarzenegger made a visit to the campus as part of a push for the Hydrogen highway project. 2003 saw the addition of five new Mark VII 40-foot buses from Orion. These buses were purchased in coordination with