49 Multiple choice questions
- Yes: Do It Now: There is enough reason to suspect impairment to justify getting the driver out of the
vehicle for further investigation.
Wait: Look for Additional Evidence: Don't get the driver out of the car yet; keep talking to and observing
the driver a bit longer. (This option may be limited if the officer's personal safety is at risk.)
No: Don't Do It: There isn't enough evidence of DUI to justify administering field sobriety tests.
screening—Administration of some structured standardized field sobriety
tests (SFSTs) to the driver to determine impairment
- determines whether there is sufficient probable cause to arrest the subject for DUI.
- absence of the odor of alcoholic beverages.
- legal and illegal drugs
- • Horizontal Gaze Nystagmus
• Walk-and-Turn (WAT)
• One-Leg Stand (OLS)
- to light
- passed out behind the wheel of a vehicle that is not in motion
- Yes—Do It Now,
Wait—Look for Additional Evidence,
or No—Don't Do It
- first suspects that an individual may be driving under the influence
- Department of Highway Safety and Motor
Vehicles to suspend the subject's driving privilege.
- • know what to look and listen for
• have the skills to ask the right kinds of questions
• choose and use the right types of tests
make the correct observations
• are motivated and apply their knowledge and skills whenever they contact someone who may be under
- a reasonable doubt that all the elements of the offense were present
- a DUI with an alcohol concentration of 0.08 or higher or
when the violator has refused any chemical test after being lawfully arrested.
- DUI arrest
- a controlled substance or a chemical substance
- possession or in the vehicle
- alcohol-impaired drivers
- FIRST full field study that utilized law
enforcement personnel experienced in the use of SFSTs.
• The initial study utilized only a few experienced officers in DUI enforcement in
both a laboratory setting and field setting.
• Correct arrest decisions were made 93 percent of the time based on the three-test
battery (HGN, WAT, OLS). These results were substantially higher than the
initial study results.
- answer the question of whether SFSTs are valid and reliable indices of the presence of alcohol when used
under present day traffic and law enforcement conditions.
• Correct decisions to arrest were made 95 percent of the time based on the threetest
battery (HGN, WAT, OLS).
• The study showed that the SFST three-test battery is the only scientifically
validated and reliable method for discriminating between impaired and
- • Phase One: Vehicle in motion—Observation of the driver operating the vehicle.
• Phase Two: Personal contact—After the vehicle stops, there usually is an
opportunity to observe and speak with the driver face-to-face.
• Phase Three: Pre-arrest screening—Administration of some structured
standardized field sobriety tests (SFSTs) to the driver to determine impairment
under 21 years of age (0.02 violation) or for commercial motor vehicle
enforcement when there is insufficient evidence of DUI
- which roadside field sobriety tests were the
- Personal contact—After the vehicle stops, there usually is an opportunity to observe and speak with the driver face-to-face.
- Vehicle in motion—Observation of the driver operating the vehicle.
- probable cause to believe that all elements of the offense are present.
- driver's license and attach it to the BLUE or transmittal copy of the DUI citation
- tens of millions
- 1. A person is guilty of the offense of driving under the influence and is subject to
punishment as provided in subsection (2) if the person is driving or in actual
physical control of a vehicle within this state and:
(a) The person is under the influence of alcoholic beverages, any chemical
substance set forth in s. 877.111, F.S., or any substance controlled under
chapter 893, F.S., when affected to the extent that the person's normal
faculties are impaired;
(b) The person has a blood-alcohol level of 0.08 or more grams of alcohol per
100 milliliters of blood; or
(c) The person has a breath-alcohol level of 0.08 or more grams of alcohol
per 210 liters of breath.
- arrest or not arrest a driver. Rather, they proceed carefully through a series of intermediate steps, each of
which helps to identify the collective evidence.
- to identify the three phases in DUI detection
• to take adequate field notes and write comprehensive reports
• to present evident in DUI in court
- conduct the SFSTs, follow arrest
procedures, administer the chemical or physical tests, and complete the necessary documentation.
- concentration at 0.04 and above
- Yes: Do It Now: There is reasonable suspicion to stop the vehicle
Wait: Look for Additional Evidence: Don't stop the vehicle yet; keep following and observing it a
No: Don't Do It: There are no grounds for stopping the vehicle.
- step in the detection process
- so impaired or injured that he or she cannot perform the tests, or he or she refuses to
submit to the tests.
- Notice of Suspension
- breath test to determinethe driver's alcoholconcentration.
- nationwide trend towards lowering the alcohol concentration limits to 0.08. The
question to be answered was "Do SFSTs discriminate at an alcohol concentration below
0.10?" The study was published by NHTSA and provided clear evidence of the validity
of the SFST battery that was repeatable across the country.
• Correct arrest decisions were made 91% of the time based on the three-test
battery (HGN, WAT, OLS).
• HGN, by itself, was 88% accurate.
• Walk-and-Turn, by itself, was 79% accurate.
• One-Leg Stand, by itself, was 83% accurate.
- Yes: Do It Now: There is probable cause to arrest the driver for DUI right now.
Wait: Look for Additional Evidence: Don't arrest the driver yet; administer another field sobriety test
No: Don't Do It: No, there is not probable cause to believe the driver has committed DUI
- • if the subject refuses (confiscate his or her driver's license)
• if the subject is eligible for a permit
• if the subject's license was surrendered
• the location of the Department of Highway Safety and Motor Vehicles Hearing Office
- three phases
- • California: 1977 (Lab)
• California: 1981 (Lab and Field)
• Maryland, District of Columbia, Virginia, North Carolina, 1983 (Field)
- • Colorado: 1995 • Florida: 1997 • San Diego: 1998