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Drunk driving is illegal in most jurisdictionThe term jurisdiction has more than one sense. Power of a court of law Jurisdiction is the power of a court to hear and decide a case before it. In most common law systems, jurisdiction is conceptually divided between jurisdiction over the subject matters; lawThis article is about law in society. For other possible meanings, see law (disambiguation). Law (a loanword from Danish-Norwegian lov , in politics and jurisprudence, is a set of rules of conduct which mandate or proscribe (or both) specified relationshis prohibiting it refer, for instance, to driving while intoxicated (DWI), driving under the influence [of alcohol or other drugs] (DUI), or drunk in charge [of a vehicle]. Such laws also apply to boatingBoating is the activity of travelling by boat. In particular, it refers to the recreational use of boats, typically focussed on the travelling itself, as opposed to activities just using the boat, such as fishing or waterskiing. Even so, it encompasses a, likewise often called boating while intoxicated (BWI) or boating under the influence (BUI). Laws also prohibit piloting aircraft while intoxicated.
Most states in the U.S. designate a "per se" bloodBlood is a circulating tissue composed of fluid plasma and cells ( red blood cells, white blood cells, platelets). Medical terms related to blood often begin in hemo or hemato ( BE: haemo and haemato from the Greek word for "blood". Blood of different spe or breathBreath is one of the few bodily functions which can be controlled both consciously and unconsciously. This is one reason why attention to it is common in many forms of meditation. It brings us oxygen, more important to us than food or water, without it we alcohol level as the thresholdA threshold is typically a minimum value for a quantity; or in a building, a strip of wood, metal or stone located on the floor in a doorway following the line of division between the two spaces linked by the doorway. In telecommunication, the term thresh point where a person is presumed to be impaired. The most common blood alcohol contentBlood Alcohol Content (or Blood Alcohol Concentration , often abbreviated BAC is the concentration of alcohol in blood, measured, by volume, as a percentage. For example, a BAC rating of 0. 20 means 1 part per 500 in an individual's blood is alcohol. (BAC) "legal limit" in the United States is 0.08%. Only three states still use the more lax, once-common standard of 0.10%. Prior to wider emphasis on drinking and driving in the 1980s, standards of 0.12% were also in place in some states. The legal limit for aircraft pilots in the U.S. is set at 0.04% while in the UK it is 0.02% for flight crew and 0.08% for groundcrew.
Unlike DUI cases that involve alcohol, there is no "per se" or legal limit that is employed for persons accused of driving under the influence of prescription medication or illicit drugs. Instead, the key inquiry focuses on whether the driver's faculties were impaired by the substance that was consumed. The detection and successful prosecution of drivers impaired by prescription medication or illegal drugs is therefore quite difficult. Similarly, although urinalysis toxicology screens can detect the presence of such substances in the driver's bloodstream, these analyses are unable to demonstrate that the substance was actually causing impairment at the time of driving. In response to these problems, several jurisdictions are currently considering legislation that would establish "zero tolerance" laws for those drivers arrested for DUI and found to have drugs or medication in their system. Additionally, technology is being developed for the purpose of administering roadside or laboratory tests that can detect the actual level of a controlled substance in an individual's body.
Many jurisdictions require more serious penalties (i.e., jail time, larger fines, longer DUI program , the installation of ignition interlock devices) in cases where the driver's BAC is over 0.20%. These additional sanctions are an attempt to deter and punish the operation of a vehicle at extremely high BAC levels and the concomittant danger posed to the safety of persons and property by heavily impaired drivers. In many cases, the reason given for these additional sanctions is because an average person would have passed out from that much alcohol. To be able to drive at that level, a person has to have gotten drunk regularly for years, to increase his/her alcohol tolerance , and therefore is likely to have driven drunk repeatedly. However, since there is currently no standard test to measure alcohol tolerance, proponents of high-BAC additional penalties point to some studies that indicate that high-BAC offenders are more likely to be involved in a crash and more likely to recidivate. Critics of such laws point out that, due to the wide variation of alcohol tolerance, people with a high tolerance will suffer the additional penalties, even though they are less impaired than people with a low tolerance that were driving with a much lower BAC.
In most U.S. states, there are additional administrative laws that further penalize people convicted of DUI, typically enforced by the department that issues driver's licenses, usually titled Department of Motor Vehicles (DMV), or Department of Licensing.