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Sixty test participants each drove an instrumented vehicle over a prescribed route that included highway and city street segments. Drivers included equal numbers of males and females, and equal numbers of individuals in Younger (18 to 25 years of age), Middle (35 to 45 years of age), and Older (55 to 65 years of age) age groups. Test participants drove on weekdays (Monday through Thursday), in good weather, and during both rush and non-rush hour morning or afternoon periods. Approximately 6,600 vehicle miles of travel on public roads were recorded. Car following range and range rate, travel speed, and driver eye glances were measured to examine driver eye glance behavior during car following. Results indicate the conditions in car following when drivers looked away from the road ahead, the distribution of glance durations when looking away, and the distribution of where drivers looked away from the road ahead.