SFST Exam 2026 | 120+ Standardized Field Sobriety Test Questions & Verified Answers | HGN, Walk-and-Turn, One-Leg Stand, DUI Detection & NHTSA Guidelines

Prepare for the SFST Exam 2026 with this comprehensive study guide featuring 120+ expertly organized exam questions and verified answers covering the core principles of Standardized Field Sobriety Testing (SFST) and DUI detection procedures. This exam-focused resource provides in-depth coverage of Horizontal Gaze Nystagmus (HGN), Vertical Gaze Nystagmus (VGN), Resting Nystagmus, Walk-and-Turn (WAT), One-Leg Stand (OLS), Preliminary Breath Test (PBT), National Highway Traffic Safety Administration (NHTSA) standards, divided attention testing, DUI detection phases, psychophysical testing, alcohol physiology, blood alcohol concentration (BAC), alcohol absorption and elimination, fermentation, distillation, implied consent, DUI per se laws, field interview techniques, post-stop observations, standardized clues, arrest decision-making, nystagmus evaluation, HGN medical checks, vehicle-in-motion cues, face-to-face interview procedures, pre-arrest screening, and evidence collection during impaired driving investigations. Presented in a structured question-and-answer format, this guide reinforces essential SFST concepts, improves knowledge retention through active recall, and serves as an effective resource for certification preparation, academy testing, and law enforcement training. Designed for law enforcement recruits, police officers, sheriff's deputies, highway patrol officers, state troopers, criminal justice students, public safety professionals, and SFST certification candidates, this study guide closely follows the concepts commonly taught in NHTSA Standardized Field Sobriety Testing training programs. It simplifies complex DUI detection procedures into concise, exam-oriented explanations while preserving the terminology and practical applications used during field investigations. The material serves as an excellent companion to academy instruction, practical SFST exercises, DUI enforcement courses, and professional certification preparation. The topics covered align with nationally recognized impaired-driving detection practices and standardized roadside sobriety testing procedures, making this resource valuable for both initial certification and refresher training. Academic & Professional References National Highway Traffic Safety Administration (NHTSA). DWI Detection and Standardized Field Sobriety Testing (SFST) Participant Manual. National Highway Traffic Safety Administration (NHTSA). Standardized Field Sobriety Testing Training Curriculum. International Association of Chiefs of Police (IACP). SFST Training Resources. Jones, A. W. Forensic Aspects of Alcohol Measurement and Interpretation. Saferstein, R. Criminalistics: An Introduction to Forensic Science. Relevant Students: SFST certification candidates, law enforcement academy recruits, police officers, sheriff's deputies, highway patrol officers, state troopers, criminal justice students, forensic science students, public safety professionals, DUI enforcement officers, traffic enforcement officers, field training officers, law enforcement instructors, impaired driving investigators, professionals preparing for the SFST certification exam. Keywords: SFST Exam 2026, Standardized Field Sobriety Test, SFST Certification, DUI Detection, DWI Detection, NHTSA, National Highway Traffic Safety Administration, HGN, Horizontal Gaze Nystagmus, Vertical Gaze Nystagmus, VGN, Resting Nystagmus, Walk and Turn, WAT, One Leg Stand, OLS, Preliminary Breath Test, PBT, BAC, Blood Alcohol Concentration, DUI Per Se, Implied Consent, Alcohol Physiology, Alcohol Absorption, Alcohol Elimination, Alcohol Dehydrogenase, Ethanol, Methanol, Isopropanol, CNS Depressant, Fermentation, Distillation, Proof Alcohol, Psychophysical Tests, Divided Attention Test, DUI Investigation, DWI Investigation, Vehicle in Motion, Physical Contact, Pre Arrest Screening, DUI Detection Phases, HGN Clues, WAT Clues, OLS Clues, Field Interview, Face to Face Interview, Arrest Decision, Standardized Clues, Post Stop Observations, Driver Impairment, Traffic Enforcement, Impaired Driving, Roadside Sobriety Testing, Law Enforcement Training, Police Academy, Criminal Justice, Practice Questions, Verified Answers, Study Guide