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Transit Access 85 the remote facility. High-quality rapid transit service and frequent shuttle service are needed to make this strategy effective. Bus Characteristics Bus dimensions, design, and internal arrangement, coupled with operating practices, will influence the design of both on-street and off-street interchange facilities. Selected design characteristics of 40- and 45-foot buses are shown in Exhibit 9-10. Urban transit buses are normally 102 inches (8.5 feet) wide. When bus mirrors are included, the outside envelope becomes about 10 feet. Therefore, a minimum of 11-foot lanes should be used for buses. Exhibit 9-10. Design characteristics for 40- and 45-foot buses. Characteristic 40-ft Regular Bus 45-ft Regular Bus Length 40 ft 45 ft a Width without mirror 8.2-8.5 ft 8.5 ft a Height (to top of air 9.9-11.5 ft b 12.5 ft c conditioning) for design Overhang Front 7.2 ft 7.9 ft Rear 9.3 ft 9.8 ft Wheelbase (rear) 25 ft 22.9 ft Driver's Eye Height 7 ft c 7 ft c Weight Curb Weight 27,000-28,000 lbs 38,150 lbs Gross Weight 36,900-40,000 lbs 55,200 lbs Ground to Floor Height 2.3 ft 2.3 ft Passenger Capacity Seats 45-50 50 Standees (Crush Load) 20 28 Turning Radius Inside 24.5-30 ft 24.5-30 ft Outsided 42-47 ft 42-47 ft Outside with Overhang 45.5-51 ft 45.5-51 ft Doors Number (typical) 2 2 Width of each door 2.3-5 ft 2.5-5 ft Angles (degrees) Approach 10 10 Breakover 10 10 Departure 9.5 9.5 a Notes: With mirrors envelope becomes 10 to 10.5 feet b Use 16 feet as minimum governing design clearance c Use 3.5 feet design d Add 1.5 feet where buses are equipped with bicycle racks Exact dimensions may vary by bus manufacturer Source: TCRP Project D-09 Phase II Draft Guide