DWI / SFST NHTSA EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2026
BEER - Answers 12 oz , 4% - 0.48 pure
WINE - Answers 4 oz , 12% , -0.48 pure
WHISKEY - Answers 1 ¼ oz , 40% alc 0.50 eth
PHASE 1 - Answers VEHICLE IN MOTION
SHOULD I STOP VEHICLE?
PHASE 2 - Answers PERSONAL CONTACT
COULD I TAKE OUT OF CAR?
PHASE 3 - Answers PRE-ARREST SCREENING
SHOULD I ARREST?
ADMINISTRATIVE for HGN? - Answers Equal pupil size
Equal tracking
2 STAGES TO WALK AND TURN - Answers INSTRUCTION
WALK & TURN
2 STAGES TO ONE LEG STAND - Answers INSTRUCTION
BALANCE / COUNTING
WALK AND TURN 8 Clues - Answers B - Loss Of Balance
S - Starts To Soon
S - Stops while walking
O - Steps Offline
W - Wrong # Of Steps
H - Fails Heel To Toe
A - Uses Arms For Balance
T - Improper Turn
ONE LEG STAND 4 Clues - Answers P - Puts Foot Down
U - Uses Arms For Balance
S - Sways
H - Hopping
HORIZONTAL GAZE NYSTAGMUS TEST - Answers EQUAL PUPIL SIZE
EQUAL TRACKING
1.) LACK OF SMOOTH PURSUIT
2.) DISTINCT & SUSTAINED NYSTAGMUS AT MAXIMUM DEVIATION
3.) ONSET OF NYSTAGMUS PRIOR TO 45 DEGREES
NON-SCIENTIFICALLY VALIDATED: (VGN) VERTICAL GAZE NYSTAGMUS
4 out of 6 clues HGN - Answers 88%
2 out of 8 clues Walk & Turn - Answers 79%
2 out of 4 clues One Leg Stand - Answers 83%
WALK AND TURN (Procedures) - Answers 9 Heel to toe steps on straight line (1/2in) turning around 9
heel to toe steps back
Must keep eyes on feet, Count out loud, arms at the side (6 inches max) once started cannot stop.
ONE LEG STAND (Procedures) - Answers Foot Approx. 6 inches off ground, both legs straight, foot
parallel to ground and pointed out. Eyes on the foot, arms at the side, counting 1,001, 1,002, 1,003 till
told to stop. Check watch
What does NHTSA stand for? - Answers National Highway Traffic Safety Administration
What does SFST stand for? - Answers Standard Field Sobriety Test
3 categories of drugs that may cause HGN in a subject - Answers CNS depressants (including alcohol)
Inhalents
Dissociative Anesthetics
Typical Friday or Saturday Night approx. what % of cars are driven by persons who are DWI? -
Answers driver's leaving bars is DWI (0.08 or greater)
AVG DWI driver commits offense 80 times / yr (1x 4-5 nights)
Nystagmus definition - Answers Involuntary jerking of the eyes
What and turn is an example of an ______________ attention test? - Answers Divided
Illegal Per Se (definition) - Answers Unlawful in and of itself. Used to describe a law which makes it
illegal to drive while having a statutorily prohibited BAC
BEER - Answers 12 oz , 4% - 0.48 pure
WINE - Answers 4 oz , 12% , -0.48 pure
WHISKEY - Answers 1 ¼ oz , 40% alc 0.50 eth
PHASE 1 - Answers VEHICLE IN MOTION
SHOULD I STOP VEHICLE?
PHASE 2 - Answers PERSONAL CONTACT
COULD I TAKE OUT OF CAR?
PHASE 3 - Answers PRE-ARREST SCREENING
SHOULD I ARREST?
ADMINISTRATIVE for HGN? - Answers Equal pupil size
Equal tracking
2 STAGES TO WALK AND TURN - Answers INSTRUCTION
WALK & TURN
2 STAGES TO ONE LEG STAND - Answers INSTRUCTION
BALANCE / COUNTING
WALK AND TURN 8 Clues - Answers B - Loss Of Balance
S - Starts To Soon
S - Stops while walking
O - Steps Offline
W - Wrong # Of Steps
H - Fails Heel To Toe
A - Uses Arms For Balance
T - Improper Turn
ONE LEG STAND 4 Clues - Answers P - Puts Foot Down
U - Uses Arms For Balance
S - Sways
H - Hopping
HORIZONTAL GAZE NYSTAGMUS TEST - Answers EQUAL PUPIL SIZE
EQUAL TRACKING
1.) LACK OF SMOOTH PURSUIT
2.) DISTINCT & SUSTAINED NYSTAGMUS AT MAXIMUM DEVIATION
3.) ONSET OF NYSTAGMUS PRIOR TO 45 DEGREES
NON-SCIENTIFICALLY VALIDATED: (VGN) VERTICAL GAZE NYSTAGMUS
4 out of 6 clues HGN - Answers 88%
2 out of 8 clues Walk & Turn - Answers 79%
2 out of 4 clues One Leg Stand - Answers 83%
WALK AND TURN (Procedures) - Answers 9 Heel to toe steps on straight line (1/2in) turning around 9
heel to toe steps back
Must keep eyes on feet, Count out loud, arms at the side (6 inches max) once started cannot stop.
ONE LEG STAND (Procedures) - Answers Foot Approx. 6 inches off ground, both legs straight, foot
parallel to ground and pointed out. Eyes on the foot, arms at the side, counting 1,001, 1,002, 1,003 till
told to stop. Check watch
What does NHTSA stand for? - Answers National Highway Traffic Safety Administration
What does SFST stand for? - Answers Standard Field Sobriety Test
3 categories of drugs that may cause HGN in a subject - Answers CNS depressants (including alcohol)
Inhalents
Dissociative Anesthetics
Typical Friday or Saturday Night approx. what % of cars are driven by persons who are DWI? -
Answers driver's leaving bars is DWI (0.08 or greater)
AVG DWI driver commits offense 80 times / yr (1x 4-5 nights)
Nystagmus definition - Answers Involuntary jerking of the eyes
What and turn is an example of an ______________ attention test? - Answers Divided
Illegal Per Se (definition) - Answers Unlawful in and of itself. Used to describe a law which makes it
illegal to drive while having a statutorily prohibited BAC
