PedPal Lite: An ATSC-Independent Safe Intersection Crossing App

PedPal is a smartphone app designed to assist pedestrians with disabilities in safely crossing signalized intersections through real time interaction with the SURTRAC adaptive traffic signal control (ATSC) system running at the intersection. Motivated by the desire to provide a cheaper and more broadly deployable variant of PedPal, this report describes the design of PedPal Lite, which eliminates the App’s dependence on SURTRAC and instead interacts directly with any NEMA-compliant controller running at the intersection. Other App improvements relating to the use of ultra-wide band beacons at the intersection to improve App localization capabilities and the capability to detect user movement outside of the crosswalk during crossing are also described.

• Record URL:
  • https://ppms.cit.cmu.edu/media/project_files/Smith_Stephen_465.pdf
• 
• Summary URL:
  • https://ppms.cit.cmu.edu/projects/detail/465
• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/78711
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Carnegie Mellon University

  Pittsburgh, PA  United States 

  Safety21 University Transportation Center

  Carnegie Mellon University
  Pittsburgh, PA  United States  15213

  Office of the Assistant Secretary for Research and Technology

  Department of Transportation
  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Smith, Stephen F
  • 0000-0002-7053-3166
• Publication Date: 2024-10-30

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; References;
• Pagination: 14p

Subject/Index Terms

• TRT Terms: Pedestrian movement; Persons with disabilities; Signalized intersections; Smartphones
• Identifier Terms: PedPal
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 01938400
• Record Type: Publication
• Report/Paper Numbers: 465
• Contract Numbers: 69A3552344811
• Files: UTC, NTL, TRIS, USDOT
• Created Date: Nov 27 2024 1:44PM