Visual Performance in Night-time Driving Conditions

An experimental multitechnique method is introduced in this paper, developed to establish a basis for a task performance-based mesopic photometry. This approach considers night-time driving by dividing visual performance into 3 visual tasks, of which achromatic threshold and reaction time are presented. The performance of both visual tasks decreased with diminishing luminance level from 1 to 0.01 cd m-super(-2), showing the strong effect of light level on visual performance in driving. The behavior of the achromatic contrast threshold and reaction time for low-contrast targets was similar in terms of spectral effects, the strongest effects occurring at the lower mesopic levels. Both measures showed the Purkinje shift with decreasing luminance levels. Experimental data was used to calculate mesopic performance measures with the new mesopic model. Results imply that compared with V(λ), spectral sensitivity in night-time driving can be better described with a mesopic model based on visual performance measures.

  • Availability:
  • Authors:
    • Eloholma, M
    • Ketomaki, J
    • Orrevetelainen, P
    • Halonen, L
  • Publication Date: 2006-5


  • English

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  • Accession Number: 01052066
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 28 2007 9:40PM