A PHYSIOLOGICAL APPRAISAL OF THE REVEALING POWER OF STREET LIGHTING INSTALLATIONS FOR LARGE COMPOSITE OBJECTS

DUNBAR'S VALUES OF THE LUMINANCE DIFFERENCE THRESHOLD UNDER STREET LIGHTING CONDITIONS ARE CONFIRMED BY NEW MEASUREMENTS SHOWING THE INFLUENCE OF THE MOTION OF THE OBJECT, EXPOSURE TIME, AND PROBABILITY OF RECOGNITION. THE VISIBILITY OF THE STANDARD TEST OBJECT UNDER DYNAMIC CONDITIONS AND THE INFLUENCE OF DISABILITY GLARE IS DERIVED, LEADING TO THE REVEALING POWER. THERE IS EVIDENCE THAT THE LIMITATION OF DISABILITY GLARE MUST NOT BE DEFINED USING A SINGLE VISUAL FUNCTION, BUT SHOULD BE RELATED TO THE VALUE OF REVEALING POWER. THE STATISTICAL TREATMENT OF THE REVEALING POWER OF LARGE COMPOSITE OBJECTS SUCH AS PEDESTRIANS LEADS TO REASONABLE VALUES OF REVEALING POWER. IT IS PROPOSED TO USE THIS SINGLE FIGURE AS A FIGURE OF MERIT FOR APPRAISING THE QUALITY OF A STREET LIGHTING INSTALLATION, TAKING INTO ACCOUNT THE INDIVIDUAL PHYSIOLOGICAL ASPECTS OF AVERAGE LUMINANCE LEVEL, LUMINANCE DISTRIBUTION, DISABILITY GLARE, AND CONTRAST RENDERING. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00243426
• Authors:
  • Hentschel, H J
• Publication Date: 1971

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 268-73
• Serial:
  • Lighting Research and Technology
  • Volume: 3
  • Issue Number: 4
  • Publisher: Sage Publications Limited
  • ISSN: 1477-1535
  • Serial URL: http://lrt.sagepub.com/

Subject/Index Terms

• TRT Terms: Brightness; Glare; Motion; Pedestrians; Quality control; Street lighting; Visibility
• Uncontrolled Terms: Quality
• Subject Areas: Highways; Pedestrians and Bicyclists; Safety and Human Factors;

Filing Info

• Accession Number: 00222430
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Feb 19 1973 12:00AM