DUI/DWI Terms and Definitions

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.

Boaters Intoxication
Drinking While Boating Open containers are legal, but operators of boats are subject to boating while intoxicated laws, similar to driving a vehicle. Operators or passengers may also be subject to public intoxication laws

Zero Tolerance Policy
Prohibition of drinking for those under the age of 21

DUI
DUI is driving under the influence; it is the offense of operating a motor vehicle in a physically or mentally impaired condition, especially after consuming alcohol or drugs. Generally, this is a lesser offense than driving while intoxicated.

Field Sobriety Tests
Field Sobriety Tests sometimes referred to by the acronym FSTs, are tests administered by the police to purportedly assess intoxication.

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.

Child endangerment
Most states now have some kind of child endangerment statute. Currently, 27 states have statutes that create special sanctions for cases of driving under the influence while the offender is transporting a child at the time of the offense.

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

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%.

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).