Specifications include, but are not limited to: . The trolley bus shall exhibit maximum passenger appeal in appearance, comfort and safety, combined with excellence in reliability, operating characteristics, efficiency, and economy of operation. It is understood that this trolley bus will have different external and internal features from other revenue service bus in The COMET’s fleet. These features shall include cupola style roofs, specialized lighting, slat type passenger seats, stainless steel fittings, alternative mirror arrangements, specialized chimes (optional), operational trolley gong (optional), and interior lighting options. The trolley bus shall perform normal operation in the environmental conditions normally occurring in the area in which The COMET is located, in ambient temperature ranges of 0°F to 105°F, at relative humidity between five percent (5%) and one hundred percent (100%), and at altitudes up to 30 feet above sea level. Trolley bus are to be used in urban areas, but at the same time must be able to maintain speeds up to sixty-two (62) miles per hour (mph) for deadhead travel to/from The COMET bus facilities or for special service operations. Trolley bus shall be able to maintain a minimum of ten (10) mph on a fifteen percent (15%) grade when loaded to Gross Vehicle Weight Rating (GVWR). The vehicle provided shall be fully Altoona tested to assure compliance with performance and safety requirements