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A study was conducted to rank 34 ergonomic characteristics of automobiles by their degree of importance to older and younger drivers. The older drivers were students in AARP driver education classes; the younger drivers were students in university classes. Three geographic locations were sampled. The primary variable analyzed was age, but geographic location, gender, driving experience, and use of glasses were also investigated. Of the characteristics that were found to be of more than average importance to older drivers, seven were appreciably more important to older drivers than to younger drivers with the “control of glare light” being the most dominant.

This paper presents results of revisions to the DETECT model made to include the effects of driver age on visual performance in night driving. This paper will present age related changes made to the subprograms that compute: the visual contrast thresholds, disability glare effects and discomfort glare index. Outputs of runs are presented which illustrate functional relationships of driver age to pedestrian seeing distance and discomfort glare experienced by drivers.