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APS home go to front of Accessible Pedestrian Signals
Go to Front page Background section Travel by Blind
Other Effects of APS
Blind Pedestrians' Access to Complex Intersections
Project 3-62 Guidelines for Accessible Pedestrian Signals
Comparison of two types of APS
Interfacing Accessible Pedestrian Signals (APS) and Traffic Signal Controllers
Wayfinding Technologies for People with Visual Impairments
Comparison of APS signal technologies
Rules & Regulations
Technologies and Features section Types
Walk Indications
Other Features
Choosing and Installing section Where to Install
Designing Installations
New Construction or Reconstruction
Retrofitting an Intersection with an APS
Installation Specifications
Field Adjustments
State of Practices section Case Studies
International Practice
Devices section Manufacturers
Selection Tool
Product Matrix
Downloads section Full Guide
Rating Scales
Field Adjustments

Current Research:
Interfacing Accessible Pedestrian Signals (APS) and Traffic Signal Controllers

US Access Board

Time frame
Feb 2002 - January 2003

Objective: To create a highly readable technical report that provides detailed APS product information specifically focused on the interfacing of APS devices and traffic signal controllers.

The research activities will:
  • Provide a detailed description of available APS technologies which provide tone, speech, vibrotactile, directional and/or mapping features for blind pedestrians;
  • Provide a detailed description of traffic signal controllers (and manufacturers) currently used in the U.S. and those that may be expected in the near future; and
  • Provide detailed information on how the APS devices interface with each traffic signal controller including wiring requirements, power requirements, interaction with conflict monitoring technology, special product installations, pedestrian signal head requirements, and lessons learned from existing installations.
Research organizations
University of Massachusetts, Amherst

David Noyce
University of Wisconsin-Madison
1210 Engineering Hall, 1415 Engineering Drive
Madison, WI 53706
608-265-1882 - noyce@engr.wisc.edu


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