VISIBILITY STUDY - APPLICATIONS TO HIGHWAY TUNNELS

ETUDE DE LA VISIBILITIE - APPLICATIONS AUX TUNNELS ROUTIERS

An attempt is made to link the results of visibility measurements taken in the laboratory and in-situ. Simple laboratory experiments are recalled, and an approximate relation is established between visibility conditions in the laboratory and in-situ using the universal curve of relative contrast sensitivity. This relation is used to derive a formula giving the visibility distance of a typical obstacle as a function of its environment (especially as a function of opacity). Some numerical applications of the formula are described. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00247669
• Corporate Authors:

  Association Francaise de l'Eclairage

  52 Boulevard Malesherbes
  75008 Paris,   France 
• Authors:
  • Dubuisson, J S
• Publication Date: 1978-2

Language

• French

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 55-65
• Serial:
  • Lux
  • Issue Number: 96
  • Publisher: Association Francaise de l'Eclairage
  • ISSN: 0024-7669

Subject/Index Terms

• TRT Terms: Distance; Environment; Field tests; Glare; Highways; Intersection elements; Laboratories; Luminance; Luminous intensity; Measurement; Tests; Tunnels; Visibility
• Uncontrolled Terms: Entrances
• Old TRIS Terms: Insitu methods
• ITRD Terms: 426: Entrance; 2455: Environment; 1677: Glare; 6226: In situ; 6237: Laboratory (not an organization); 505: Light intensity; 525: Luminance; 6136: Measurement; 6255: Test; 3374: Tunnel; 6783: Visibility
• Subject Areas: Bridges and other structures; Design; Highways; Safety and Human Factors; I25: Design of Tunnels; I85: Safety Devices used in Transport Infrastructure;

Filing Info

• Accession Number: 00310163
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Jun 9 1980 12:00AM