Detectable Warning Surfaces : Color, Contrast, and Reflectance

Details

• Creators:
  Bentzen, Billie L. ; Nolin, Tina ; Easton, Randolph
• Corporate Creators:
  John A. Volpe National Transportation Systems Center, (U.S.)
• Corporate Contributors:
  United States. Federal Transit Administration
• Subject/TRT Terms:
  • Accessibility
  • Contrast
  • Detectors
  • Signals
  • Visually impaired persons
  • Warning signals
• Publication/ Report Number:
  DOT-VNTSC-FTA-94-5 ; FTA-MA-06-0201-94-3
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Federal Transit Administration
• NTL Classification:
  NTL-PUBLIC TRANSPORTATION-PUBLIC TRANSPORTATION ; NTL-PUBLIC TRANSPORTATION-Transit Safety and Security ; NTL-SAFETY AND SECURITY-Rail Safety ; NTL-SAFETY AND SECURITY-Transit Safety and Security
• Abstract:
  The visual contrast of ten detectable warning surface/platform pairs was measured on an interior platform illuminated at 20 foot-candles, as recommended by the Americans with Disabilities Act Accessibility Guidelines (ADAAG) A4.429.2, by 24 persons having very low vision. Tests included objective and subjective measures of visual detectability. Objective measures were accuracy (correct identification in the presence of a warning surface) and response time. Subjective measures were each participant's choice of three most visually detectable contrasts, the one most visually detectable contrast, and the least visually detectable contrast.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/10819/dot_10819_DS1.pdf
• File Type:
  [PDF - 1.46 MB]
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha256:89e727f1c71fc9c3cc2179295afdfd0a35e53138b7460a9af5f5787c04a08cd2