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Results of previous SAE drivers' eye-location studies have been used to develop a fixed seat eyellipse and contours that describe drivers' head locations. Centroid data from these and other eye-location studies are used as a means of locating the SAE eyellipse according to seat back angle. Part I comprises the discussion of these data. Studies recently completed provided data on drivers' eye locations for varied vehicle packages ranging from sports cars to heavy trucks. The results are summarized in Part II as a series of tables, which include statistical definitions of tangent cutoff eyellipses. Part III of this report describes a method for positioning a fixed seat eyellipse according to seat back angle. A method is also shown for measuring headroom relative to seat back angle.

This report presents the results of the SAE Human Factor Committee Driver Control Reach Study conducted in June-August 1971. Over 100 test subjects were measured on three test fixtures representing a sports car, a typical passenger car, and a heavy truck. Finger grasp reach was recorded to 40 locations in front of the driver. The report presents the background information for a forthcoming SAE Recommended Practice on Driver Arm Reach.