U.S. Department of Transportation - National Highway Traffic Safety Administration (NHTSA) - Model Driver Spreening and Evaluation Program: Final Technical Report - Volume I: Project Summary and Model Program Recommendations

Measure of Functional Capability: Sensory (Visual) Processes
Driving Situation	A. Static Acuity (photopic)	B. Static Acuity (low luminance: mesopic)	C. Static Contrast Sensitivity	D. Visual Field Sensitivity
I. High Speed/High Complexity (e.g., Principal Arterials)	20/40	20/50	CS=30 @15 cpd	120° total (high contrast spot)
	20/40	20/80	1.5 log CS	120° total
	20/40	20/100	1.35 log CS	120° total
	20/40	20/60	1.4 log CS	H120°xV90° total
	20/40	< 20/80	1.4 log CS < 1.35 log CS on Pelli Robson Chart	120° total
II. High Speed/Low Complexity (e.g., Freeways)	20/40	20/50	CS=30 @15 cpd	120° total (high contrast spot)
	20/60	20/120	1.2 log CS	120° total
	20/60	20/100	1.35 log CS	120° total
	20/60	20/80	1.4 log CS	H120°xV90° total
	20/40	< 20/80	< 1.35 log CS	120° total
III. Low Speed/High Complexity (e.g., Downtown Streets)	20/60	20/75	CS=20 @15 cpd	140° total (high contrast spot)
	20/40	20/80	1.5 log CS	90° total
	20/40	20/100	1.35 log CS	120° total
	20/60	20/80	1.4 log CS	120° total (60° monocular)
	20/40	< 20/100	< 1.35 log CS	120° total
IV. Low Speed/Low Complexity (e.g., Residential Streets)	20/60	20/75	CS=20 @15 cpd	140° total (high contrast spot)
	20/80	20/160	1.2 log CS	90° total
	20/60	20/100	1.35 log CS	120° total
	20/60	20/100	1.4 log CS	120° total (60° monocular)
	20/60	< 20/100	< 1.20 log CS	120° total

Measure of Functional Capability: Medical Factors/Dementia
Driving Situation	A. General Cognitive Function	B. "Executive Functioning": (e.g., planning, reasoning, and decision making)	C. Coordination of Motor Processes: [e.g., hand /eye (tracking) and coordination of legs to control brake and accelerator]
I. High Speed/High Complexity (e.g., Principal Arterials)	Mini-Mental Status Examination (MMSE) <18 MMSE = 24 Modified Mini-Mental Status Examination (3MS) = 80/100 Trails B completed in 90 s Short Blessed Test with cutoff score=8 Traffic Sign Recognition Tests MMSE: to pass screen, S must score at least 24, and get item 30 correct as well as all 3 of the 3 memory tasks correct MMSE with cutpoint <18 or <24	Trails B completed correctly by 300 sec Trails B, score 2 sd below the mean for age-appropriate samples Number Cancellation, score 2 sd below the mean for age-appropriate samples Standardized road test or simulation (e.g., Washington University Road Test) Trails B: Time to complete = 1 sd below the mean if used in license setting as a trigger for further clinical assessment; 2 s.d. below the mean if used as the stand-alone determination of impairment in license setting. Trails B: > 2 sd above (worse) age and education adjusted normative values for more exclusive criterion, >1 sd above adjusted normative values for more inclusive criterion.	Foot-Tapping Speed 2.5 sd below normal mean = ? rate Grooved Peg Board: dominant hand = 150 sec; non-dominant hand = 178 sec. Purdue Pegboard, score 2 sd below mean on age-appropriate norms Road test or simulator to test coordination of legs to control brake & accelerator Hand/Eye Coordination - Grooved pegboard; Mobility - Gait Speed. Cutpoints > 2 s.d. above (worse) than age appropriate norms for more exclusive; > 1 s.d. above norms for more inclusive criterion.
II. High Speed/Low Complexity (e.g., Freeways)	MMSE < 18 MMSE < 17 3MS = 75/100	Trails B completed correctly by 300 sec Trails B, score 2 sd below the mean Number Cancellation, score 2 sd below the mean	Foot-Tapping Speed 2.5 sd below mean Grooved Peg Board: dominant hand = 150 sec; non-dominant hand = 178 sec. Purdue Pegboard, score 2 sd below mean
III. Low Speed/High Complexity (e.g., Downtown Streets)	MMSE < 18 MMSE ≤ 17 3MS = 75/100	Trails B completed correctly by 300 sec Trails B, score 2 sd below the mean Number Cancellation, score 2 sd below the mean	Foot-Tapping Speed 2.5 sd below mean Grooved Peg Board: dominant hand = 150 sec; non-dominant hand = 178 sec. Purdue Pegboard, score 2 sd below mean
IV. Low Speed/Low Complexity (e.g., Residential Streets)	MMSE < 18 MMSE ≤ 17 3MS = 75/100 Trails B completed in 120 s.	Trails B completed correctly by 300 sec Trails B, score 2 sd below the mean Number Cancellation, score 2 sd below the mean	Foot-Tapping Speed 2.5 sd below mean Grooved Peg Board: dominant hand = 150 sec; non-dominant hand = 178 sec. P Purdue Pegboard, score 2 sd below mean

Appendix A:
Step 3 Responses by Delphi Panel of Experts

Table 4.
Step 3 responses for Sensory (Visual) Processes Delphi,
where each cell addresses minimum performance requirements
for a critical dimension of functional capability (A. - D.)
in an identified driving situation (I. - IV.)

Table 5.
Step 3 responses for Medical Factors/Dementia Delphi,
where each cell addresses minimum performance requirements
for a critical dimension of functional capability (A. - C.)
in an identified driving situation (I. - IV.)

Appendix A: Step 3 Responses by Delphi Panel of Experts

Table 4. Step 3 responses for Sensory (Visual) Processes Delphi, where each cell addresses minimum performance requirements for a critical dimension of functional capability (A. - D.) in an identified driving situation (I. - IV.)

Table 5. Step 3 responses for Medical Factors/Dementia Delphi, where each cell addresses minimum performance requirements for a critical dimension of functional capability (A. - C.) in an identified driving situation (I. - IV.)

Appendix A:
Step 3 Responses by Delphi Panel of Experts

Table 4.
Step 3 responses for Sensory (Visual) Processes Delphi,
where each cell addresses minimum performance requirements
for a critical dimension of functional capability (A. - D.)
in an identified driving situation (I. - IV.)

Table 5.
Step 3 responses for Medical Factors/Dementia Delphi,
where each cell addresses minimum performance requirements
for a critical dimension of functional capability (A. - C.)
in an identified driving situation (I. - IV.)