VISIBILITY OF TRAFFIC CONTROL DEVICES: CATERING FOR THE REAL OBSERVER

This paper reviews the visual characteristics of the 'real' observer using both conventional methods of assessment and an information theory approach. Recent research by the authors and their colleagues on the acquisition of information by observers with normal and degraded vision shows that present scales for specifying visual performance do not adequately represent the visual requirements of many practical tasks. These studies also suggest that there should be a more systematic approach to the development of design rules based on visual performance characteristics of the whole user population rather than only that proportion of the population which has normal vision. Equally there should be a more purposeful and systematic approach to the imposition of minimum visual standards to ensure that observers maintain a level of visual capability adequate for the designed task.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00140139
• Corporate Authors:

  Taylor & Francis

  4 Park Square, Milton Park
  Abingdon,   United Kingdom  OX14 4RN
• Authors:
  • Johnston, A W
  • Cole, B L
  • Jacobs, R J
  • Gibson, A J
• Publication Date: 1976-9

Media Info

• Features: References;
• Pagination: p. 591-609
• Serial:
  • Ergonomics
  • Volume: 19
  • Issue Number: 5
  • Publisher: Taylor & Francis
  • ISSN: 0014-0139
  • EISSN: 1366-5847
  • Serial URL: http://www.tandfonline.com/loi/terg20

Subject/Index Terms

• TRT Terms: Ability tests; Automobile drivers; Color vision; Design; Drivers; Human factors engineering; Human factors engineering; Measurement; Needs assessment; Research; Road markings; Traffic control devices; Traffic signals; Traffic signs; Visibility; Vision
• Uncontrolled Terms: Design criteria; User needs
• Old TRIS Terms: Driver vision; Highway signs (Signals and markings); Traffic marking
• ITRD Terms: 2077: Colour blindness; 9011: Design (overall design); 2229: Perception; 2247: Reaction (human); 9075: Standardization; 553: Traffic sign; 565: Traffic signal; 6783: Visibility; 2066: Vision
• Subject Areas: Design; Highways; Research; Safety and Human Factors;

Filing Info

• Accession Number: 00153261
• Record Type: Publication
• Source Agency: Engineering Index
• Files: ITRD, TRIS, ATRI
• Created Date: Oct 13 1977 12:00AM