The bus shall be equipped with a corrosion-resistant, outside rearview mirrors mounted with stable supports to minimize vibration. Mirrors shall be firmly attached to the bus to minimize vibration and to prevent loss of adjustment with a breakaway mounting system. Mirrors shall permit the driver to view the roadway along the sides of the bus, including the rear wheels. Mirrors should be positioned to prevent blind spots.
Mirrors shall retract or fold sufficiently to allow bus washing operations but avoid contact with windshield.
The bus shall be equipped with two flat outside mirrors, each with not less than 50 sq in. of reflective surface. The mirrors shall be located so as to provide the driver a view to the rear along both sides of the bus and shall be adjustable both in the horizontal and vertical directions to view the rearward scene. The roadside rearview mirror shall be positioned so that the driver’s line of sight is not obstructed.
Mirrors with integrated turn signal, both sides Alternative
Mirrors with external mounted turn signal, one side alternative
Mirrors with external mounted turn signal, both sides
Mirrors shall be provided for the driver to observe passengers throughout the bus without leaving the seat and without shoulder movement. The driver shall be able to observe passengers in the front/entrance and rear/exit areas, anywhere in the aisle, and in the rear seats.
Use with 30 ft length Alternative
Use with 35 ft length
A minimum of 8000 sq in. of window area, including operator and door windows, shall be required on each side of the standard configuration bus.
Use with 40 ft length
A minimum of 10,000 sq in. of window area, including operator and door windows, shall be required on each side of the standard configuration bus.
Use with 45-ft length Alternative
Use with 60-ft length
The windshield shall permit an operator’s field of view as referenced in SAE Recommended Practice J1050. The vertically upward view shall be a minimum of 15 degrees, measured above the horizontal and excluding any shaded band. The vertically downward view shall permit detection of an object 3½ ft high no more than 2 ft in front of the bus. The horizontal view shall be a minimum of 90 degrees above the line of sight. Any binocular obscuration due to a center divider may be ignored when determining the 90-degree requirement, provided that the divider does not exceed a 3-degree angle in the operator’s field of view. Windshield pillars shall not exceed 10 degrees of binocular obscuration. The windshield shall be designed and installed to minimize external glare as well as reflections from inside the bus.
The windshield shall be easily replaceable by removing zip-locks from the windshield retaining moldings. Bonded-in-place windshields shall not be used. The windshield glazing material shall have a 1/4 in. (6 mm) nominal thickness laminated safety glass conforming to the requirements of ANSI Z26.1-1996 Test Grouping 1A and the Recommended Practices defined in SAE J673. The glazing material shall have single-density tint. The upper portion of the windshield above the operator’s field of view shall have a dark, shaded band with a minimum luminous transmittance of 6 percent when tested in accordance with ASTM D-1003. Winglets may be bonded.