Trans 330.10(17)(17) Lights, lamps and reflectors. Lighting devices and reflectors shall conform to the requirement for color, position and type under 49 CFR 393.9 to 393.26. Trans 330.10(18)(a)(a) There shall be 2 outside rearview mirrors, one to the right and one to the left of the driver. Each mirror shall be firmly supported and adjustable to give the driver a clear view past both the right and left rear of the bus as provided under 49 CFR 393.80 and 571.111. Trans 330.10(18)(b)(b) In addition to the mirrors under par. (a), there may be an adjustable convex mirror mounted on the left and right front sides of the motor bus to provide an additional close-in field of vision of the front of the bus and rearward. The convex mirror may be mounted separately or attached to the mirrors under par. (a) in a manner that does not reduce the driver’s view. Mirrors may not be broken, cracked or discolored. Trans 330.10(19)(19) Openings. All openings in the floorboard or firewall between chassis and passenger compartment, such as for the gear shift lever and auxiliary brake lever, shall be sealed to prevent fumes or foreign material from entering the passenger compartment. The motor bus shall be free of rusted or deteriorated areas that could permit foreign substances to enter the interior of the vehicle. Trans 330.10(20)(a)(a) All seats shall be securely fastened to that part or parts of the body that support them. Any seat cushions shall be fastened so as to prevent them from disengaging from the seat frames in event of an accident. Seat cushions and seat backs may not have any torn or worn-through covering material. Trans 330.10(20)(b)(b) A motor bus may not be equipped with aisle seats unless those seats are so designed and installed as to automatically fold when they are unoccupied and leave a clear aisle with a minimum clearance of 12 inches in width. Trans 330.10(21)(a)(a) The front service door shall be under control of the driver and so designed as to prevent accidental opening or closing. Trans 330.10(21)(b)(b) The front service door shall be located on the right side of the bus and within the view of the driver. Trans 330.10(21)(c)(c) The front service door shall have a minimum horizontal opening of 24 inches and a minimum vertical opening of 68 inches. Trans 330.10(21)(d)(d) Any translucent panel in the front service door shall be of safety glass, plexiglass, polycarbonate or a similar material that provides an equivalent level of safety. Trans 330.10(22)(22) Rear exit door. A motor bus equipped with a separate exit door shall conform to the following: Trans 330.10(22)(a)(a) The exit door shall be located on the right side to the rear of the center of the passenger section. Trans 330.10(22)(b)(b) The exit door shall be a double or single folding-type door, or a 2-section push-type door. Each section of a double-folding door shall have a pliant edge at least 2 inches wide, and each single-folding door shall have a pliant edge at least 3 inches wide. Each section of a push-type door shall have a pliant edge of at least one-half inch wide. Trans 330.10(22)(c)(c) The exit door shall have a minimum horizontal open clearance of 24 inches at the center, 22 inches at the top and bottom, and a minimum vertical open clearance of 68 inches. The exit door may not open inwardly. Trans 330.10(22)(d)1.1. The words “EXIT DOOR” conspicuously lettered on the interior of the door or immediately adjacent to the door, in letters at least 1N inches high. Trans 330.10(22)(d)2.2. An interlocking device to prevent the bus from moving when the exit door is open. Trans 330.10(22)(e)(e) The pliant edges of a folding-type exit door shall be sensitized so as to actuate reverse action of the door. The pliant edges of a folding-type exit door shall be connected to a warning signal. Trans 330.10(22)(f)(f) Push-type exit doors need not be equipped with sensitized edges if the door control mechanism is designed to do all the following: Trans 330.10(22)(f)1.1. Delay release of the brake interlock until after the doors are completely closed. Trans 330.10(22)(f)2.2. Prevent the doors from being unlocked by the driver’s door control while pressure is applied on the inside of the doors.