Term of the Road Dictionary

coefficient of retroreflected luminance

  • Language : PIARC Road Dictionary / English
  • Theme : Roads Road Equipment Road Lighting
  • Definition : Ratio of the luminance of a field and the illuminance of a plane perpendicular to the illumination direction at that field, for observation and illumination directions close to each other and both forming grazing angles with the road surface [CEN].

This site uses cookies to optimize its operation. They allow you to securely access your personal space and download our publications. You accept their use by clicking on the "Continue" button.