DUI/DWI Terms and Definitions

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.

DWI
Driving while intoxicated is the offense of operating a motor vehicle in a physically or mentally impaired condition after consuming enough to raise one’s blood alcohol content above the statutory limit, or after consuming drugs. Penalties for this offense vary widely.

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%.

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.

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

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

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.

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.

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.

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).