Closed Loop Operation of Network Based Accessible Pedestrian Signals
This is the fourth year for our research on Smart Signals Technology. The research addresses issues of safety and access for an underserved population of intersection users - pedestrians with disabilities. However, the capabilities of the technology can assist all users of an intersection by transforming the intersection into a networked control center, capable of advanced detection and communication.
This year’s project focuses first on security and reliability. For low-vision pedestrians, audible messages provide the same movement control as do the signal lights for pedestrians with normal visual acuity. The importance of a correct audible message is possibly more vital to a low vision pedestrian than are the lights for non-vision impaired pedestrians, since he or she is unable to see potential conflicts. Failure to play the correct audible message or tone is not detectable using equipment in present traffic controller cabinets. The vulnerability of low vision pedestrians makes it imperative that they receive the most accurate information possible to provide the safest possible travel through the intersection.