Page 1 of 202
SFST Test Study GUIDE EXAM PRACTICE EXAM LATEST
ALL 300 QUESTIONS WITH CORRECT SOLUTIONS AND
RATIONALES JUST RELEASED 300 Randomized Practice
Questions with Answers & Rationales
PHASE 1: VEHICLE IN MOTION
1. During Phase 1 of DUI detection, what is the officer's primary decision point?
A) "Is the driver impaired?"
B) "Do I have sufficient grounds to stop this vehicle?"
C) "Should I arrest this driver?"
D) "What is the driver's BAC?"
Answer: B
Phase 1 focuses on observing the vehicle in motion. The officer must determine if there are sufficient
grounds to initiate a traffic stop based on observed violations or suspicious driving behavior.
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2. Which of the following is NOT a category of driving cues used in Phase 1 detection?
A) Problems maintaining proper lane position
B) Speed and braking problems
C) Vigilance problems
D) Driver's age and gender
Answer: D
NHTSA categorizes driving cues into four types: problems maintaining lane position, speed and braking
problems, vigilance problems, and judgment problems. Driver demographics are not a cue category.
3. A vehicle weaves within its lane, nearly striking a curb twice within 2 minutes. This is an example of
which category of driving cue?
A) Speed and braking problems
B) Problems maintaining proper lane position
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C) Vigilance problems
D) Judgment problems
Answer: B
Weaving within a lane and nearly striking a curb are classic examples of problems maintaining proper
lane position. These cues indicate the driver may have difficulty controlling the vehicle laterally.
4. A driver brakes unnecessarily or stops too far from a stop sign. This falls under which category of cues?
A) Problems maintaining proper lane position
B) Vigilance problems
C) Speed and braking problems
D) Judgment problems
Answer: C
Unnecessary braking and stopping too far from a stop sign are speed and braking problems. These
indicate the driver may have difficulty with speed perception and vehicle control.
, Page 4 of 202
5. A driver fails to signal or responds slowly to traffic signals. This is an example of:
A) Judgment problems
B) Vigilance problems
C) Speed and braking problems
D) Problems maintaining proper lane position
Answer: B
Failing to signal and slow response to traffic signals are vigilance problems. These indicate the driver is
not paying adequate attention to the driving environment.
6. A driver makes an illegal turn or drives on the wrong side of the road. This is an example of:
A) Speed and braking problems
B) Vigilance problems
SFST Test Study GUIDE EXAM PRACTICE EXAM LATEST
ALL 300 QUESTIONS WITH CORRECT SOLUTIONS AND
RATIONALES JUST RELEASED 300 Randomized Practice
Questions with Answers & Rationales
PHASE 1: VEHICLE IN MOTION
1. During Phase 1 of DUI detection, what is the officer's primary decision point?
A) "Is the driver impaired?"
B) "Do I have sufficient grounds to stop this vehicle?"
C) "Should I arrest this driver?"
D) "What is the driver's BAC?"
Answer: B
Phase 1 focuses on observing the vehicle in motion. The officer must determine if there are sufficient
grounds to initiate a traffic stop based on observed violations or suspicious driving behavior.
, Page 2 of 202
2. Which of the following is NOT a category of driving cues used in Phase 1 detection?
A) Problems maintaining proper lane position
B) Speed and braking problems
C) Vigilance problems
D) Driver's age and gender
Answer: D
NHTSA categorizes driving cues into four types: problems maintaining lane position, speed and braking
problems, vigilance problems, and judgment problems. Driver demographics are not a cue category.
3. A vehicle weaves within its lane, nearly striking a curb twice within 2 minutes. This is an example of
which category of driving cue?
A) Speed and braking problems
B) Problems maintaining proper lane position
, Page 3 of 202
C) Vigilance problems
D) Judgment problems
Answer: B
Weaving within a lane and nearly striking a curb are classic examples of problems maintaining proper
lane position. These cues indicate the driver may have difficulty controlling the vehicle laterally.
4. A driver brakes unnecessarily or stops too far from a stop sign. This falls under which category of cues?
A) Problems maintaining proper lane position
B) Vigilance problems
C) Speed and braking problems
D) Judgment problems
Answer: C
Unnecessary braking and stopping too far from a stop sign are speed and braking problems. These
indicate the driver may have difficulty with speed perception and vehicle control.
, Page 4 of 202
5. A driver fails to signal or responds slowly to traffic signals. This is an example of:
A) Judgment problems
B) Vigilance problems
C) Speed and braking problems
D) Problems maintaining proper lane position
Answer: B
Failing to signal and slow response to traffic signals are vigilance problems. These indicate the driver is
not paying adequate attention to the driving environment.
6. A driver makes an illegal turn or drives on the wrong side of the road. This is an example of:
A) Speed and braking problems
B) Vigilance problems
