DUI/DWI Terms and Definitions

Horizontal Gaze Nystagmus (HGN)
Horizontal gaze nystagmus is a naturally occurring involuntary jerking of the eyeballs as they gaze side to side. It is theorized that when a person is impaired by alcohol, the nystagmus (the jerking of the eyeballs) is magnified or pronounced.

Public Intoxication
Public intoxication is the appearance of a person who is under the influence of drugs or alcohol in a place open to the general public. In most American jurisdictions, public intoxication is considered a misdemeanor

Excessive Drunkenness
A state of drunkenness in which a person is so far deprived of reason and understanding that he or she is incapable of understanding the character and consequences of an act.

Failed Sobriety Test
A sobriety test is a method of determining whether a person is intoxicated. Among the common sobriety tests are coordination tests and the use of mechanical devices to measure the blood alcohol content of a person’s breath sample.

Controlled Substances
Health and other public concerns have generated detailed Federal and state regulation of the sale and possession of alcoholic beverages, tobacco products, and a wide range of other "controlled substances."

OUI
OUI is operating or attempting to operate a motor vehicle while under the influence of intoxicants. "Intoxicants" are any substance, including alcohol and both illegal and prescription drugs. A person is "under the influence" if their mental or physical faculties are impaired to the slightest degree, regardless of whether it affects the a actual operation of the vehicle.

Drunk
Intoxication as we know it is not required for one to be guilty of drunk driving. Your condition may be enough for you to be found guilty of a drunk driving offense under the current definition of the law.

Legal State Limits
Laws for DWI and DUI vary from state-to-state. There is a chart listing state blood alcohol limits, license suspension, ignition interlock and forfeiture penalties.

Breathalyzer
Breathalyzer is the trademark (of National Draeger, Inc. which acquired the Breathalyzer division from Smith and Wesson) for the most commonly used breath-testing device in New Jersey. The Breathalyzer converts breath alcohol into a blood alcohol reading.

Sleep Deprivation
Drowsy driving is greatly under reported because there is no test for it, as there is for intoxication, no clear way to identify it, and many states don't even have a code for it on their vehicle accident reporting forms.