NHTSA SFST Study Guide – Questions With
Applicable Solutions
What are the 3 phases of DWI enforcement? Correct Answer -
Phase 1: Vehicle in Motion
Phase 2: Personal Contact
Phase 3: Pre-arrest Screening
What decision are you making in phase 1? Correct Answer -
Should I stop the vehicle?
What decision are you making in phase 2? Correct Answer -
Should the driver exit the vehicle?
What decision are you making in phase 3? Correct Answer -
Should I arrest the subject?
What are two requirements of a good field sobriety test? Correct
Answer - 1.) Simple
2.) Divide attention
What are the 3 validated field sobriety tests? Correct Answer -
1.) Horizontal Gaze Nystagmus
2.) Walk and Turn
3.) One leg Stand
What are the validated clues for HGN, in the correct order? Correct
Answer - 1.) Lack of Smooth Pursuit
2.) Distinct and sustained nystagmus at maximum deviation
3.) Onset prior to 45
Define HGN Correct Answer - Involuntary jerking of the eyes
occurring as the eyes gaze to the side.
Applicable Solutions
What are the 3 phases of DWI enforcement? Correct Answer -
Phase 1: Vehicle in Motion
Phase 2: Personal Contact
Phase 3: Pre-arrest Screening
What decision are you making in phase 1? Correct Answer -
Should I stop the vehicle?
What decision are you making in phase 2? Correct Answer -
Should the driver exit the vehicle?
What decision are you making in phase 3? Correct Answer -
Should I arrest the subject?
What are two requirements of a good field sobriety test? Correct
Answer - 1.) Simple
2.) Divide attention
What are the 3 validated field sobriety tests? Correct Answer -
1.) Horizontal Gaze Nystagmus
2.) Walk and Turn
3.) One leg Stand
What are the validated clues for HGN, in the correct order? Correct
Answer - 1.) Lack of Smooth Pursuit
2.) Distinct and sustained nystagmus at maximum deviation
3.) Onset prior to 45
Define HGN Correct Answer - Involuntary jerking of the eyes
occurring as the eyes gaze to the side.
