Drunk driving

United States In the United States, most states have generalized their criminal offense statutes to driving under the influence (DUI). These DUI statutes generally cover intoxication by any drug, including alcohol. Such laws may also apply to operating boats, aircraft, farm machinery, horse-drawn carriages, and bicycles. Specific terms used to describe alcohol-related driving offenses include "drinking and driving", "drunk driving", and "drunken driving". Most DUI offenses are alcohol-related so the terms are used interchangeably in common language, and "drug-related DUI" is used to distinguish. United Kingdom In the United Kingdom, there are two separate offences to do with alcohol and driving. The first is "Driving or attempting to drive with excess alcohol" (legal code DR10), the other is known as "In charge of a vehicle with excess alcohol" (legal code DR40) or "drunk in charge" due to the wording of the Licensing Act 1872. In relation to motor vehicles, the Road Safety Act 1967 created a narrower offense of driving (or being in charge of) a vehicle while having breath, blood, or urine alcohol levels above the prescribed limits (colloquially called "being over the limit"). These provisions were re-enacted in the Road Traffic Act 1988. A separate offense in the 1988 Act applies to bicycles. While the 1872 Act is mostly superseded, the offense of being "drunk while in charge ... of any carriage, horse, cattle, or steam engine" is still in force; "carriage" has sometimes been interpreted as including mobility scooters. == Measurement of intoxication ==

Depending on the jurisdiction, a drunk driver's level of intoxication may be measured by police using three methods: blood, breath, or urine, resulting in a blood alcohol concentration (BAC), breath alcohol concentration (BrAC), or urine result. For law enforcement purposes, breath analysis using a breathalyzer is the preferred method, since results are available almost instantaneously. A measurement in excess of the specific threshold level, such as a BAC of 0.08% (8 basis points), defines the criminal offense with no need to prove impairment. In some jurisdictions, there is an aggravated category of the offense at a higher BAC level, such as 0.12%, 0.15%, or 0.25%. In many jurisdictions, police officers can conduct field tests of suspects to look for signs of intoxication. There have been cases in Canada where officers have come upon a suspect who is unconscious after a crash and officers have taken a blood sample. With the advent of a scientific test for BAC, law enforcement regimes moved from field sobriety testing (e.g., asking the suspect to stand on one leg) to having more than a prescribed amount of blood alcohol content while driving. However, this does not preclude the simultaneous existence and use of the older subjective tests in which police officers measure the intoxication of the suspect by asking them to do certain activities or by examining their eyes and responses. The validity of the testing equipment/methods for determining breath and blood alcohol and mathematical relationships between breath/blood alcohol and intoxication levels have been criticized. Improper testing and equipment calibration is often used in defense of a DUI or DWI. == Effects of alcohol ==

Effects on cognitive processes Alcohol is a depressant, which mainly affects the function of the brain. Alcohol first affects the most vital components of the brain and "when the brain cortex is released from its functions of integrating and control, processes related to judgment and behavior occur in a disorganized fashion and the proper operation of behavioral tasks becomes disrupted." Alcohol weakens a variety of skills that are necessary to perform everyday tasks. Drinking enough alcohol to cause a blood alcohol concentration (BAC) of 0.03–0.12% typically causes a flushed, red appearance in the face and impaired judgment and fine muscle coordination. A BAC of 0.09% to 0.25% causes lethargy, sedation, balance problems, and blurred vision. A BAC from 0.18% to 0.30% causes profound confusion, impaired speech (e.g., slurred speech), staggering, dizziness, and vomiting. A BAC from 0.25% to 0.40% causes stupor, unconsciousness, anterograde amnesia, vomiting, and respiratory depression (potentially life-threatening). A BAC from 0.35% to 0.80% causes a coma (unconsciousness), life-threatening respiratory depression, and possibly fatal alcohol poisoning. There are a number of factors that affect the time in which BAC will reach or exceed 0.08, including weight, the time since one's recent drinking, and whether and what one ate within the time of drinking. A 170lb male can drink more than a 135lb female, before being over the BAC level. One of the main effects of alcohol is severely impairing a person's ability to shift attention from one thing to another, "without significantly impairing sensory motor functions." Several testing mechanisms are used to gauge a person's ability to drive, which indicate levels of intoxication. One of these is referred to as a tracking task, testing hand–eye coordination, in which "the task is to keep an object on a prescribed path by controlling its position through turning a steering wheel. Impairment of performance is seen at BACs of as little as 0.7 mg/mL (0.066%)." A 1964 paper by Robert Frank Borkenstein studied data from Grand Rapids, Michigan. The main finding of the Grand Rapids study was that for higher values of BAC, the collision risk increases steeply; for a BAC of 0.15%, the risk is 25 times higher than for zero blood alcohol. The BAC limits in Germany and many other countries were set based on this Grand Rapids study. Subsequent research showed that all extra collisions caused by alcohol were due to at least 0.06% BAC, 96% of them due to BAC above 0.08%, and 79% due to BAC above 0.12%. One surprising aspect of the study was that, in the main analysis, a BAC of 0.01–0.04% was associated with a lower risk of collisions than a BAC of 0%, a feature referred to as the Grand Rapids Effect or Grand Rapids Dip. A 1995 Würzburg University study of German data similarly found that the risk of collisions appeared to be lower for drivers with a BAC of 0.04% or less than for drivers with a BAC of 0%. The analysis in the Grand Rapids paper relied primarily on univariate statistics, which could not isolate the effects of age, gender, and drinking practices from the effects of other variables. In particular, when the data is re-analyzed by constructing separate BAC-crash rate graphs for each drinking frequency, there are no J-shapes in any of the graphs and collision rates increase starting from 0% BAC. The analysis of the Grand Rapids study was biased by including drivers younger than 25 and older than 55 that did not drink often but had significantly higher crash rates even when not drinking alcohol. Perceived recovery rate A direct effect of alcohol on a person's brain is an overestimation of how quickly their body is recovering from the effects of alcohol. A study, discussed in the article "Why drunk drivers may get behind the wheel", was done with college students in which the students were tested with "a hidden maze learning task as their BAC [Blood Alcohol Content] both rose and fell over an 8-hour period." The researchers found through the study that as the students became more drunk there was an increase in their mistakes "and the recovery of the underlying cognitive impairments that lead to these errors is slower, and more closely tied to the actual blood alcohol concentration, than the more rapid reduction in participants' subjective feeling of drunkenness." According to the National Highway Traffic Safety Administration, alcohol-related crashes cause approximately $37 billion in damages annually. DUI and alcohol-related crashes have produced an estimated $45 billion in damages every year. The combined costs of towing and storage fees, attorney fees, bail fees, fines, court fees, ignition interlock devices, traffic school fees and DMV fees mean that a first-time DUI charge could cost thousands to tens of thousands of dollars. Traffic collisions are predominantly caused by driving under the influence for people in Europe between the age of 15 and 29; it is one of the main causes of mortality. Over 7.7 million underage people ages 12–20 claim to drink alcohol, and on average, for every 100,000 underage Americans, 1.2 died in drunk-driving traffic crashes. == Characteristics of drunk drivers ==

Personality traits Although situations differ and each person is unique, some common traits have been identified among drunk drivers. In the study "personality traits and mental health of severe drunk drivers in Sweden", 162 Swedish DUI offenders of all ages were studied to find links in psychological factors and characteristics. There are a wide variety of characteristics common among DUI offenders which are discussed, including: "anxiety, depression, inhibition, low assertiveness, neuroticism and introversion". There is also a more specific personality type found, typically more antisocial, among repeat DUI offenders. It is not uncommon for them to actually be diagnosed with antisocial personality disorder (ASPD) and exhibit some of the following personality traits: "low social responsiveness, lack of self-control, hostility, poor decision-making lifestyle, low emotional adjustment, aggression, sensation seeking and impulsivity". In addition to these societal restraints, DUI offenders ignore their own personal experience, including both social and physical consequences. The study "Cognitive Predictors of Alcohol Involvement and Alcohol consumption-Related Consequences in a Sample of Drunk-Driving Offenders" was performed in Albuquerque, New Mexico on the cognitive, or mental, factors of DUI offenders. Characteristics such as gender, marital status, and age of these DWI offenders were similar to those in other populations. Approximately 25% of female and 21% of male offenders had received "a lifetime diagnosis of alcohol abuse" and 62% of females and 70% of males "received a diagnosis of alcohol dependence." Another cognitive factor may be that of using alcohol to cope with problems. It is becoming increasingly apparent that the DWI offenders do not use proper coping mechanisms and thus turn to alcohol for the answer. Examples of such issues "include fights, arguments, and problems with people at work, all of which imply a need for adaptive coping strategies to help the high-risk drinker to offset pressures or demands." DWI offenders would typically prefer to turn to alcohol than more healthy coping mechanisms and alcohol can cause more anger which can result in a vicious circle of drinking more alcohol to deal with alcohol-related issues. This is a not the way professionals tell people how to best deal with the struggles of everyday life and calls for "the need to develop internal control and self-regulatory mechanisms that attenuate stress, mollify the influence of relapse-based cues, and dampen urges to drink as part of therapeutic interventions." ==Field sobriety testing==

To attempt to determine whether a suspect is impaired, police officers in the United States usually will administer field sobriety tests to determine whether the officer has probable cause to arrest an individual for suspicion of driving under the influence (DUI). The Preliminary Breath Test (PBT) or Preliminary Alcohol Screening test (PAS) is sometimes categorized as part of field sobriety testing, although it is not part of the series of performance tests. Commercial drivers are subject to PBT testing in some US states as a "drug screening" requirement. ==Laws by country==

The laws relating to drunk driving vary significantly between countries, particularly the BAC limit before a person is charged with a crime. Thresholds range from the limit of detection (zero-tolerance) to 0.08%. Some countries have no limits or laws on blood alcohol content. Some jurisdictions have multiple levels of BAC for different categories of drivers. In some jurisdictions, impaired drivers who injure or kill another person while driving may face heavier penalties. Some jurisdictions have judicial guidelines requiring a mandatory minimum sentence for certain situations. DUI convictions may result in multi-year jail terms and other penalties ranging from fines and other financial penalties to forfeiture of one's license plates and vehicle. In many jurisdictions, a judge may also order the installation of an ignition interlock device. Some jurisdictions require that drivers convicted of DUI offenses use special license plates that are easily distinguishable from regular plates, known in popular parlance as "party plates" or "whiskey plates". Implied consent laws There are laws in place to protect citizens from drunk drivers, called implied consent laws. Drivers of any motor vehicle automatically consent to these laws, which include the associated testing, when they begin driving. In most jurisdictions (with the notable exception of a few, such as Brazil), refusing consent is a different crime from drunk driving itself and has its own set of consequences. There have been cases where drivers were "acquitted of the DWI [driving while intoxicated] offense and convicted of the refusal (they are separate offenses), often with significant consequences (usually license suspension)". A driver must give their full consent to comply with testing because "anything short of an unqualified, unequivocal assent to take the Breathalyzer test constitutes a refusal." It has also been ruled that defendants are not allowed to request testing after they have already refused in order to aid officers' jobs "to remove intoxicated drivers from the roadways" and ensure that all results are accurate. United States The United States has extensive case law and law enforcement programs related to drunk driving. ==Solutions==

Criminologist Hung-En Sung has concluded in 2016 that with regards to reducing drunk driving, law enforcement has not generally proven to be effective. Worldwide, the majority of those driving under the influence do not end up arrested. At least two-thirds of alcohol-involved fatalities involve repeat drinking drivers. Sung, commenting on measures for controlling drunk driving and alcohol-related accidents, noted that the ones that have proven effective include "lowering legal blood alcohol concentrations, controlling liquor outlets, nighttime driving curfews for minors, educational treatment programs combined with license suspension for offenders, and court monitoring of high-risk offenders." In general, programs aimed at reducing society's consumption of alcohol, including education in schools, are seen as an effective long-term solution. Strategies aiming to reduce alcohol consumption among adult offenders have various estimates of effectiveness. Reducing alcohol consumption Studies have shown that there are various methods to help reduce alcohol consumption: • increasing the price of alcohol. This tool is used in rehabilitation programmes and for school buses. Designated driver programmes A designated driver programme helps to separate driving from drinking in social places such as restaurants, discos, pubs, bars. In such a programme, a group chooses who will be the drivers before going to a place where alcohol will be consumed; the drivers abstain from alcohol. Members of the group who do not drive would be expected to pay for a taxi when it is their turn. Police enforcement Enforcing the legal limit for alcohol consumption is the usual method to reduce drunk driving. Experience shows that: • introduction of breath testing devices by the police in the 1970s had a significant effect, but alcohol remains a factor in 25% of all fatal crashes in Europe • fines appear to have little effect on reducing alcohol-impaired driving • driving licence measures with a duration of 3 to 12 months • imprisonment is the least effective remedy Education Education programmes used to reduce drunk driving levels include: • driver education in schools and in basic driver training • driver improvement courses on alcohol (rehabilitation courses) • public campaigns • promotion of safety culture ==Prevalence==

In the United States, local law enforcement agencies made 1,467,300 arrests nationwide for driving under the influence of alcohol in 1996, compared to 1.9 million such arrests during the peak year in 1983. In 1997 an estimated 513,200 DWI offenders were in prison or jail, down from 593,000 in 1990 and up from 270,100 in 1986. In the United States, DUI and alcohol-related collisions produce an estimated $45 billion in damages every year. In Europe, about 25% of all road fatalities are alcohol-related, while very few Europeans drive under the influence of alcohol. According to estimates, 3.85% of drivers in European Union drive with a BAC of 0.2 g/L and 1.65% with a BAC of 0.5 g/L and higher. For alcohol in combination with drugs and medicines, the rates are respectively 0.35% and 0.16%. == See also ==