DUI/DWI Terms and Definitions

B.A.C.
B.A.C. is an acronym for Blood Alcohol Concentration. The most definitive way to test for B.A.C. is to test blood. The most common testing method is to take samples of breath (most usually in New Jersey with a “Breathalyzer”). The alcohol in the breath is mathematically converted to a blood alcohol reading.

Ignition Interlock Devices
The courts may require first and repeat DUI offenders to use Ignition Interlock Devices. To start the vehicle, the driver must blow into the device. The vehicle will not start if the driver's blood alcohol content exceeds 0.05%.

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.

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.

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

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.

Administrative License Revocation (ALR)
Simply put, the DMV automatically revokes your license when you are arrested for DUI as part of its duty to regulate drivers’ licenses. (The court may also take your license, and may also fine or jail you.)

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."

Impairment
Well known is the fact that the consumption of alcohol can cause impairment. Perhaps less recognized is that fact that impairment rises gradually at lower levels but dramatically at higher levels of blood alcohol concentration (BAC).

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.