Standard Bus Procurement Guidelines - APTAStandards.com
Standard Bus Procurement Guidelines - APTAStandards.com Standard Bus Procurement Guidelines - APTAStandards.com
Standard Bus Procurement Guidelines sensor shall activate the malfunction indicator. Malfunction and other indicators listed in the following table shall be supplied on all buses. Space shall be provided on the panel for future additions of no less than (5 or number specified by procuring agency) indicators as the capability of on-board diagnostic systems improves. Visual Indicator Audible Alarm Condition or Malfunction A/C Stop None Compressor stopped due to high/low pressure or loss of refrigerant Check Engine None Engine Electronic Control Unit detects a malfunction Check Transmission None Transmission Electronic Control Unit detects a malfunction Fire Bell Over-temperature condition in engine compartment Generator Stop None Loss of generator output Hot Engine Buzzer Excessive engine coolant temperature Low Air Buzzer Insufficient air pressure in either primary or secondary reservoirs Low Oil Buzzer Insufficient engine oil pressure Low Coolant Buzzer Insufficient engine coolant level Wheelchair Lift Beeper Wheelchair lift is not stowed and disabled 5.4.6.2 WINDSHIELD WIPERS The bus shall be equipped with a variable speed windshield wiper for each half of the windshield, with separate controls for each side. If powered by compressed air, exhaust from the wiper motors shall be muffled or piped under the floor of the bus. No part of the windshield wiper mechanism shall be damaged by manual manipulation of the arms. At 60 mph, no more than 10 percent of the wiped area shall be lost due to windshield wiper lift. Both wipers shall park along the edges of the windshield glass. Windshield wiper motors and mechanisms shall be easily accessible for repairs or service from inside or outside the bus and shall be removable as complete units. The fastener that secures the wiper arm to the drive mechanism shall be corrosion resistant. 5.4.6.3 WINDSHIELD WASHERS The windshield washer system shall deposit washing fluid on the windshield and, when used with the wipers, shall evenly and completely wet the entire wiped area. If powered by compressed air, all fluid shall be purged from the lines after each use of the washers. The windshield washer system shall have a minimum 3-gallon reservoir, located for easy refilling and protected from freezing. Reservoir pumps, lines, and fittings shall be corrosion-resistant, and the reservoir itself shall be translucent for easy determination of fluid level. Technical Specifications 176 10/18/07
Standard Bus Procurement Guidelines 5.4.6.4 OPERATOR’S LIGHTING The operator's area shall have a light to provide general illumination and it shall illuminate the half of the steering wheel nearest the operator to a level of 10 to 15 foot-candles. This light shall be controlled by the operator. 5.4.6.5 OPERATOR’S SEAT 5.4.6.5.1 Dimensions The operator's seat shall be comfortable and adjustable so that persons ranging in size from the 95thpercentile male to the 5th-percentile female may operate the bus. The operator's seat cushion shall have a minimum width of 18 inches, a length of 16 to 18 inches, and rearward slope of 5 ∀5 degrees. The operator's seat back height, measured from the point of intersection of the uncompressed seat cushion with the seat back to the top of the back, shall be 20 ∀2 inches. The angle formed between the seat back and the seat cushion shall be adjustable in the range of 95 to 110 degrees. Height of the seat shall be adjustable so that the distance between the top of the uncompressed seat cushion and the floor may vary between 17 and 21 inches. The seat shall be adjustable forward and rearward for a minimum travel of 7.5 inches. While seated, the operator shall be able to make all of these adjustments by hand without complexity, excessive effort, or being pinched. Adjustment mechanisms shall hold the adjustments and shall not be subject to inadvertent changes. 5.4.6.5.2 Structure and Materials The operator's seat shall be contoured to provide maximum comfort for extended period of time. Cushions shall be fully padded with at least 3 inches of neoprene foam, or material with equal properties, in the seating areas at the bottom and back. Upholstery shall be ventilated, transportation grade vinyl. Baseline: Use for standard (air-cushion) seat. The operator's seat shall be cushioned supplementally by an air cylinder or air diaphragm. These devices may also provide the seat height adjustments. Damping shall be provided as required. Alternative: Use for fixed seat. All visually exposed metal on the operator's seat, including the pedestal, shall be unpainted aluminum or stainless steel. Baseline: Use for standard (may be lap only) seat belt. Required Type I seat belts shall be fastened to the seat so that the operator may adjust the seat without resetting the seat belt. Seat belts shall be stored in automatic retractors. Alternative: Use for three-point (lap and shoulder) seat belt. Seat belts shall be provided across the operator’s lap and diagonally across the operator’s chest. The operator shall be able to use both belts by connecting a single buckle Technical Specifications 177 10/18/07
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<strong>Standard</strong> <strong>Bus</strong> <strong>Procurement</strong> <strong>Guidelines</strong><br />
5.4.6.4 OPERATOR’S LIGHTING<br />
The operator's area shall have a light to provide general illumination and it shall illuminate the half of<br />
the steering wheel nearest the operator to a level of 10 to 15 foot-candles. This light shall be<br />
controlled by the operator.<br />
5.4.6.5 OPERATOR’S SEAT<br />
5.4.6.5.1 Dimensions<br />
The operator's seat shall be <strong>com</strong>fortable and adjustable so that persons ranging in size from the 95thpercentile<br />
male to the 5th-percentile female may operate the bus. The operator's seat cushion shall<br />
have a minimum width of 18 inches, a length of 16 to 18 inches, and rearward slope of 5 ∀5 degrees.<br />
The operator's seat back height, measured from the point of intersection of the un<strong>com</strong>pressed seat<br />
cushion with the seat back to the top of the back, shall be 20 ∀2 inches. The angle formed between<br />
the seat back and the seat cushion shall be adjustable in the range of 95 to 110 degrees. Height of the<br />
seat shall be adjustable so that the distance between the top of the un<strong>com</strong>pressed seat cushion and the<br />
floor may vary between 17 and 21 inches. The seat shall be adjustable forward and rearward for a<br />
minimum travel of 7.5 inches. While seated, the operator shall be able to make all of these<br />
adjustments by hand without <strong>com</strong>plexity, excessive effort, or being pinched. Adjustment<br />
mechanisms shall hold the adjustments and shall not be subject to inadvertent changes.<br />
5.4.6.5.2 Structure and Materials<br />
The operator's seat shall be contoured to provide maximum <strong>com</strong>fort for extended period of time.<br />
Cushions shall be fully padded with at least 3 inches of neoprene foam, or material with equal<br />
properties, in the seating areas at the bottom and back. Upholstery shall be ventilated, transportation<br />
grade vinyl.<br />
Baseline: Use for standard (air-cushion) seat.<br />
The operator's seat shall be cushioned<br />
supplementally by an air cylinder or air<br />
diaphragm. These devices may also provide<br />
the seat height adjustments. Damping shall be<br />
provided as required.<br />
Alternative: Use for fixed seat.<br />
All visually exposed metal on the operator's seat, including the pedestal, shall be unpainted aluminum<br />
or stainless steel.<br />
Baseline: Use for standard (may be lap only)<br />
seat belt.<br />
Required Type I seat belts shall be fastened to<br />
the seat so that the operator may adjust the<br />
seat without resetting the seat belt. Seat belts<br />
shall be stored in automatic retractors.<br />
Alternative: Use for three-point (lap and<br />
shoulder) seat belt.<br />
Seat belts shall be provided across the<br />
operator’s lap and diagonally across the<br />
operator’s chest. The operator shall be able to<br />
use both belts by connecting a single buckle<br />
Technical Specifications 177 10/18/07
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