Specifications include, but are not limited to: 9.1. The audible pedestrian system (APS) shall be an IntelliCross Audible Pedestrian System, or an approved equal by the City of Edmond. 9.2. The button system shall receive its power from the signal head of the same direction. 9.3. The intelligence of the button system shall reside with the button station and the connected power supply in the signal head. 9.4. The push button station color shall be p33 gloss black. The plunger button shall be powder coated silver. The Vibrotactile arrow shall be E-coated black with clear topcoat. 9.5. The Vibrotactile arrow shall be rotatable without disassembly of the APS enclosure. The arrow shall be adjustable in rotation by 45-degree increments. 9.6. The Vibrotactile arrow shall be raised to a minimum of 0.031 inches from the pedestrian detector surface; between 1.378 inches and 1.772 inches in length; a stroke width between 10 and 15 percent of the length of the arrow; an open arrowhead at 45 degrees to the shaft and not exceeding 33 percent of the length of the shaft. 9.7. Vibrotactile arrow shall be affixed to the pedestrian detector face with security type screws. 9.8. The pushbutton shall operate in a failsafe manner. If the APS attributes fail, the button will activate the pedestrian signals as normal. 9.9. The pushbutton housing shall incorporate a nominal 15w speaker that shall provide audible feedback. 9.10. The housing shall be vandal proof and be powder coated to provide a high contrast to the support structure for the visually impaired. 9.11. The housing for the APS assembly must be made of corrosion-resistant material. 9.12. A sound verification feature shall be employed in the APS button to prevent incorrect or erroneous sound direction indications from reaching pedestrians. The sound verification system shall provide independent monitoring of the sounds and pedestrian signals and independent control over the release of the sound to the pedestrian. The APS button internal program shall compare the digital sound to be played directly with pedestrian signals monitored by the push button station. This shall be accomplished by a spate microcontroller chip located directly in each button station. 9.13. The button shall provide several optional sounds for beaconing including custom sounds/messages. This sound shall be configurable to play through a push button speaker and/or overhead speaker. 9.14. The button shall provide smart detection logic to provide a way-finding sound “on-demand”. This includes a short button press to only activate the button Walk sound/message and a long button press to play the walk and/or pedestrian clear sound/message through the button and overhead beacon speaker. 9.15. A microphone shall be integrated at the button station to automatically adjust the volume levels to compensate for the ambient noise. Ambient noise shall be sampled prior to each sound play. 9.16. Push button shall be ADA compliant, shall be cane friendly and shall meet PROWAAC guidance, as well as City of Edmond Specification E1005.
