Pedestrian conspicuity under the standard headlight system related to driver perception. Paper prepared for the 54th Annual Meeting of the Transportation Research Board TRB, Washington, D.C., January 1975.

The degree of visual conspicuity necessary for pedestrians under nighttime conditions is discussed. The parameters of brightness and area are related to subjective driver interpretations of pedestrian visibility and conspicuity. The performance of various reflective surfaces illuminated by the present standard headlight system is compared with the brightness and area requirements found for each level of visibility and conspicuity.