FDLE Traffic Law Enforcement 1 — Questions and Answers

Question 1: Under Florida's implied consent law (F.S. §316.1932), what does a driver impliedly consent to by operating a motor vehicle?

Random roadside sobriety checkpoints at any time
Breath, blood, or urine testing for alcohol or controlled substances when lawfully arrested for DUI (Correct answer)
Vehicle searches whenever stopped by law enforcement
Providing personal identification to any officer on request

Correct answer: Breath, blood, or urine testing for alcohol or controlled substances when lawfully arrested for DUI

Florida's implied consent law provides that by driving on Florida roads, a person impliedly consents to breath, blood, or urine testing for DUI if lawfully arrested for driving under the influence.

Florida Statute §316.1932 (implied consent law): any person who accepts the privilege of driving on Florida's public roads impliedly consents to submit to a breath, urine, or blood test to determine alcohol content or presence of controlled substances when lawfully arrested for DUI. Refusal consequences: first refusal — civil penalty, 1-year license suspension; second refusal — misdemeanor crime, 18-month suspension. Blood test may be compelled without consent if there are injuries or fatalities (or with a warrant). Birchfield v. North Dakota (2016) held breath tests incident to DUI arrest are constitutional without a warrant, but blood tests generally require a warrant.

Question 2: Which of the following is a valid reason for an officer to stop a vehicle under Florida law?

The officer has a feeling the occupants may be involved in crime
The officer observes a traffic infraction or equipment violation, or has reasonable articulable suspicion of criminal activity (Correct answer)
The vehicle matches the make and model of one involved in a crime in the county
The registered owner of the vehicle has a prior criminal record

Correct answer: The officer observes a traffic infraction or equipment violation, or has reasonable articulable suspicion of criminal activity

A traffic stop is constitutional when the officer personally observes a traffic violation/equipment defect (giving probable cause), or when the officer has reasonable articulable suspicion of criminal activity beyond a hunch.

Per Whren v. United States (1996): a traffic stop is valid if an officer has probable cause to believe a traffic violation occurred — the officer's subjective motivation is irrelevant. For investigatory stops without a traffic violation, Terry v. Ohio's reasonable articulable suspicion standard applies. Valid bases for Florida traffic stops: observed traffic infraction, observed equipment violation, information from dispatch that the vehicle was involved in a crime, or articulable facts suggesting criminal activity. A mere hunch, or the registered owner's prior record alone, does not justify a stop.

Question 3: In Florida, at what blood alcohol concentration (BAC) is a commercial motor vehicle driver considered legally impaired under DUI laws?

0.08
0.04 (Correct answer)
0.02
0.10

Correct answer: 0.04

Florida law sets the DUI threshold for commercial motor vehicle operators at 0.04 BAC — half the standard 0.08 limit — reflecting the heightened safety responsibility of operating large vehicles.

Florida Statute §316.193 establishes different BAC thresholds: Standard drivers — 0.08; Commercial motor vehicle drivers (operating a CMV) — 0.04 per Federal Motor Carrier Safety Regulations (49 CFR Part 382) adopted in Florida; Persons under 21 — 0.02 zero tolerance (F.S. §322.2616). For commercial drivers, a BAC of 0.04 or higher while operating a CMV results in out-of-service status for 24 hours and DUI charges. CDL holders face a 1-year disqualification on first DUI in a CMV (lifetime on second).

Question 4: What is the significance of Florida's 'Move Over' law (F.S. §316.126)?

Vehicles must always yield the right of way to emergency vehicles entering an intersection
Drivers must vacate the lane immediately adjacent to a stopped emergency or service vehicle, or slow to 20 mph below the posted limit if lane change is not possible (Correct answer)
Drivers must pull over immediately whenever they hear an emergency siren within 500 feet
All traffic must stop when emergency vehicles are present on any portion of a roadway

Correct answer: Drivers must vacate the lane immediately adjacent to a stopped emergency or service vehicle, or slow to 20 mph below the posted limit if lane change is not possible

Florida's Move Over Law requires drivers approaching stopped emergency vehicles or service vehicles with lights activated to change lanes away from the vehicle or slow to 20 mph below the posted speed limit.

Florida Statute §316.126 (Move Over Act): when a law enforcement, emergency, utility, sanitation vehicle, or wrecker is stopped with activated warning lights on or beside a highway, approaching drivers in the immediately adjacent lane must: (1) vacate that lane (move over one lane), OR (2) if lane change is not safely possible, slow to 20 mph below the posted speed limit (on roads posted 25 mph or less, reduce to 5 mph). Violation is a moving traffic infraction. Enhanced penalties apply if a crash occurs. This law protects officers and roadside workers.

Question 5: During a DUI investigation, an officer administers the Horizontal Gaze Nystagmus (HGN) test. What is the maximum number of clues an officer can observe?

3 clues
4 clues
6 clues (Correct answer)
8 clues

Correct answer: 6 clues

The HGN test has 3 clues scored per eye (6 total maximum). The three clues are: lack of smooth pursuit, distinct and sustained nystagmus at maximum deviation, and onset of nystagmus before 45 degrees.

The Horizontal Gaze Nystagmus (HGN) test is one of three NHTSA-validated Standardized Field Sobriety Tests. The test scores three clues in each eye: (1) Lack of smooth pursuit — the eye jerks rather than following smoothly, (2) Distinct and sustained nystagmus at maximum deviation — when held at maximum deviation for 4 seconds, clear nystagmus is present, (3) Onset of nystagmus prior to 45 degrees — nystagmus begins before the 45-degree angle from center. Three clues per eye × 2 eyes = 6 maximum clues. Four or more clues indicate a 77% probability that BAC is 0.08 or above.

Question 6: Under Florida law, what is the maximum speed limit on rural interstate highways unless otherwise posted?

60 mph
65 mph
70 mph (Correct answer)
75 mph

Correct answer: 70 mph

Florida Statute §316.183 establishes a maximum speed of 70 mph on rural interstate highways unless otherwise posted by the Florida Department of Transportation.

Florida Statute §316.183 establishes maximum speed limits: (1) 30 mph in residential districts, (2) 20 mph in school zones during school hours, (3) 55 mph in other locations (general rule), (4) 65 mph on limited access highways (urban interstates), (5) 70 mph on rural limited access highways. FDOT may raise limits on rural limited access highways to 75 mph in some areas based on engineering studies. Florida also follows the basic speed law: drivers must travel at a speed that is reasonable and prudent under existing conditions.

FDLE Traffic Law Enforcement 1

Under Florida's implied consent law (F.S. §316.1932), what does a driver impliedly consent to by operating a motor vehicle?

Select your answer