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Alcohol and Drug Limits
- 1/27If your BAC is measured at 0.08%
In Illinois, 0.08% is the legal limit for non commercial adult drivers. At or above this level, you are legally intoxicated.
When BAC is 0.04% for commercial driver
Commercial drivers are held to stricter standards. Anything 0.04% or higher results in DUI charges and disqualification.
If you are under 21 and any alcohol is detected, then
Illinois enforces zero tolerance for underage drivers. Even 0.01% BAC can trigger DUI penalties and license suspension.
While driving after using marijuana
Marijuana impairs reaction time. Driving under its influence is treated as DUI even with medical use.
If prescription drugs impair your driving ability
Legal prescriptions that impair safe driving still lead to DUI charges. Always follow medication warnings.
When refusing a roadside breath test
Under implied consent law, refusal to test leads to immediate license revocation even without a court conviction.
At a checkpoint, you test positive for both alcohol and drugs
Mixing substances increases impairment. Illinois allows compounded DUI charges for multiple intoxicants.
If your BAC is 0.15% during traffic stop
A BAC of 0.15% or more triggers harsher penalties including jail time and longer license suspension.
When arrested for a second DUI within 5 years
A second DUI within 5 years in Washington carries a mandatory minimum of 30 days in jail, plus fines, license suspension, and installation of an ignition interlock device. Courts may also require alcohol education and treatment programs.
While on probation and caught drinking and driving
Driving under the influence while on DUI probation in Washington is a serious violation. It typically results in at least 30 days of jail, possible probation revocation, and reinstatement of suspended penalties like treatment or license loss.
If you test below 0.08% but still drive erratically
Officers may charge you with DUI based on driving behavior and physical signs, even under legal BAC.
At a crash scene, you are suspected of DUI, then
In serious injury or fatal crashes, blood testing is typically mandated to check for intoxication levels.
If you drive while hangover but test 0.00% BAC
Fatigue, slow reflexes, or residual drug effects can impair driving. Officers may still cite unsafe operation.
While transporting open containers of alcohol
Illinois prohibits open alcohol in the cabin area. Open container violations are ticketable even if the driver is sober.
If you take drugs recreationally a day before driving
Some drugs stay in the system and affect reflexes for hours or days. Driving impaired the next day is still DUI.
At a DUI stop, your eyes are bloodshot and speech slurred
Physical signs give officers probable cause. They may proceed with arrest and testing regardless of BAC reading.
When you are a minor with alcohol in the vehicle
Under 21 drivers may not transport alcohol unless accompanied by an adult or for work. It is a separate offense.
If caught driving under drug influence with children inside, then
DUI with minors in the vehicle is treated more severely and may include child endangerment penalties.
When you cause a crash while intoxicated
DUI related injuries or fatalities can elevate the charge to a felony with long prison terms.
If you refuse both breath and blood testing
Double refusal strengthens the case against you. It leads to license suspension and automatic DUI assumptions.
While driving with a revoked license from DUI
Driving under revocation is a criminal offense. Penalties include arrest, jail, and longer suspension.
When alcohol is consumed inside a moving vehicle
Even as a passenger, drinking in a moving vehicle is prohibited. Both driver and drinker can be cited.
If you are caught driving after taking illegal stimulants
Drugs like cocaine or meth cause severe impairment. Detection leads to full DUI enforcement and prosecution.
If you are visibly high but pass a breath test
Breathalyzers detect alcohol. If signs point to drug use, officers may request urine or blood tests.
At a DUI hearing, you claim medical marijuana use
Impairment, regardless of legality, is not a defense. If you are unsafe to drive, DUI charges will apply.
If you drive after alcohol and sleep medication combo
Mixing sedatives and alcohol greatly increases crash risk. Driving in that condition is a clear DUI.
If you are arrested for DUI and refuse court ordered treatment
Refusing required programs can delay license reinstatement and may result in further sentencing consequences.