The SFST (Standardized Field Sobriety Testing) battery is a series of three psychophysical tests validated by NHTSA to detect impairment in drivers. Mastering these protocols is essential for law enforcement officers to effectively identify DUI suspects and provide admissible courtroom testimony. Our free resources cover the SFST test procedures, scoring criteria, and legal standards.
Whether you are a police academy recruit or an experienced officer seeking recertification, our SFST practice test questions will help you retain critical knowledge. We cover the Horizontal Gaze Nystagmus (HGN), Walk and Turn (WAT), and One Leg Stand (OLS) tests in detail, ensuring you are prepared for both the written exam and practical applications.
The NHTSA SFST curriculum is the gold standard for impaired driving enforcement in the United States. Passing the SFST instructions and proficiency exams certifies you to administer these tests during traffic stops. Practice with the free Standardized Field Sobriety Testing Certified practice test on PracticeTestGeeks (7 questions with answer explanations).
Facts verified Oct 15, 2026 against National Highway Traffic Safety Administration (NHTSA) and International Association of Chiefs of Police (IACP); SFST ce. Dates that have passed are removed automatically.
| Item | Detail | Official source |
|---|---|---|
| Passing score | 80% | National Highway Traffic Safety Administration (NHTSA) and International Association of Chiefs of Police (IACP); SFST ce |
| Retake policy | Retest 15–30 days after classroom training | National Highway Traffic Safety Administration (NHTSA) and International Association of Chiefs of Police (IACP); SFST ce |
| Renewal | Refresher requirements determined by individual states | theiacp.org |
| Delivery | Written examination | National Highway Traffic Safety Administration (NHTSA) and International Association of Chiefs of Police (IACP); SFST ce |
Facts verified Oct 15, 2026 against National Highway Traffic Safety Administration (NHTSA) and International Association of Chiefs of Police (IACP); SFST ce. Dates that have passed are removed automatically.
Interactive Standardized Field Sobriety Testing Certified resources on PracticeTestGeeks, free to start:
Prepare for the SFST - Standardized Field Sobriety Testing Certified exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
Quick review of SFST clues and procedures
The NHTSA SFST curriculum is broken down into specific modules. Understanding the mechanics of the Horizontal Gaze Nystagmus (HGN), Walk and Turn (WAT), and One Leg Stand (OLS) is critical for passing the SFST written test.
The most critical part of the SFST test is giving the instructions exactly as written in the NHTSA SFST manual. Deviating from the script can invalidate the test results in court.
Estimated score calculation
Required to Pass: ~70% (Estimated)
Your Score: 35 correct ✓ PASS
Almost all sworn officers receive SFST certification for free as part of their employment training. Agencies also typically cover the cost of the SFST refresher course.
Join thousands of officers who have used our free SFST practice test questions to master the NHTSA standards and ace their certification.
To maintain SFST certification, officers must demonstrate continued proficiency. While NHTSA guidelines suggest a refresher every two years, state POST boards set the specific requirements.
Regular SFST refresher training is crucial not just for certification, but for maintaining credibility during cross-examination in court.
| Pros | Cons |
|---|---|
| Validates your knowledge and skills objectively | Study materials can be expensive |
| Increases job market competitiveness | Exam anxiety can affect performance |
| Provides structured learning goals | Requires dedicated preparation time |
| Networking opportunities with other certified professionals | Retake fees apply if you don't pass |
Try these questions from our free Standardized Field Sobriety Testing Certified practice tests. The correct answer and an explanation follow each question.
How often must SFST practitioners typically renew their certification to remain authorized to administer standardized field sobriety tests?
Answer: C. Every 2 years
Most SFST certifications require renewal every 2 years to ensure practitioners remain current with updated protocols and legal standards.
What is the NHTSA-standardized count duration for the One-Leg Stand test?
Answer: C. 30 seconds
The subject is instructed to count aloud while standing on one leg for 30 seconds per NHTSA protocol.
An officer whose SFST certification has lapsed should do which of the following before testifying as an SFST expert?
Answer: B. Complete recertification training before testifying
Lapsed certification undermines an officer's qualification as an expert witness; recertification must be completed before resuming formal SFST testimony.
When cross-examined about HGN testing, which foundational point should an SFST officer be prepared to establish first?
Answer: B. Scientific validity of HGN as an impairment indicator
Before HGN evidence is admitted, the officer must establish that the test is based on sound scientific principles linking nystagmus to alcohol impairment.
Take the full Standardized Field Sobriety Testing Certified practice test