What is the difference between Accessible Pedestrian Singals (APS) and Audible Information Devices (AID)?
APS are used at crossings where visual Walk/Don’t Walk signals are used to give pedestrians with vision loss equivalent information audibly.
The iNS is an Accessible Pedestrian Signal (APS). It provides pedestrians with audible and tactile signals equivalent to the visible Walk/Don’t Walk, to allow pedestrians with blindness or limited vision to cross with confidence.
AID are used at crossings with flashing warning lights that warn vehicles of the presence of a crossing pedestrian, such as rectangular rapid flashing beacons (RRFBs), round pedestrian-activated beacons, in-roadway warning lights, and others.
The iNX is an Audible Information Device (AID). It provides an accessible way for pedestrians to activate pedestrian warning lights at unsignalized crossings. Because there is no Walk/Don’t Walk signal at these crossings, the iNX cannot tell the pedestrian when it is safe to cross, and lacks the vibration and percussive audible Walk signal of the iNS.