University Transport System 428 was a operated in regular service by the University Transport System (currently known as Unitrans) in Davis, California, and was one of an initial fleet of five "old-look" single-deck buses that were purchased in the late 1960s to supplement the fleet of double decker buses that had been in service as early as 1967. Having been sold, it is no longer part of the Unitrans fleet. Technical specifications Manufacturer: General Motors Corporation, Truck & Coach Division Model: TDH-4507 Date built: Between 1946 and 1948 Engine: Detroit Diesel 6-71 diesel with a Spicer angle-drive 2-speed automatic transmission. Length: 35 feet Width: 8 feet Seating capacity: 45 Date acquired by Unitrans: Before September 1969 Current status: Retired and sold.