A research project by the Transportation Research Board's National Cooperative Highway Research Program that is the basis for requirements for accessible pedestrian signals in the Manual on Uniform Traffic Control Devices.
Full title: "Joint Technical Assistance on the Title II of the Americans with Disabilities Act (ADA) Requirements to Provide Curb Ramps when Streets, Roads, or Highways are Altered through Resurfacing" with accompanying questions and answers and glossary.
Resources include: Designing Sidewalks and Trails for Access, Questions and Answers About ADA and Section 504, Memorandum on Use of the Revised Draft Guidelines, and Memorandum on Detectable Warning Requirements.
See resources on accessible intersections.