"All the World's a Stage We Pass Through" R. Ayana

Showing posts with label marijuana and car accidents. Show all posts
Showing posts with label marijuana and car accidents. Show all posts

Sunday, 14 June 2015

Marijuana Prohibition Is a Moral Scandal Built on a Mountain of Lies: Why the war on weed is unscientific, unconstitutional, and unjust


Marijuana Prohibition Is a Moral Scandal Built on a Mountain of Lies
Why the war on weed is unscientific, unconstitutional, and unjust

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Marijuana Prohibition Is Unscientific


A few days before the House of Representatives passed a federal ban on marijuana in June 1937, the Republican minority leader, Bertrand Snell of New York, confessed, "I do not know anything about the bill." The Democratic majority leader, Sam Rayburn of Texas, educated him. "It has something to do with something that is called marihuana," Rayburn said. "I believe it is a narcotic of some kind.

That exchange gives you a sense of how much thought Congress gave marijuana prohibition before approving it. Legislators who had heard of the plant knew it as the "killer weed" described by Federal Bureau of Narcotics Commissioner Harry Anslinger, who claimed marijuana turned people into homicidal maniacs and called it "the most violence-causing drug in the history of mankind." Anslinger warned that "marihuana causes white women to seek sexual relations with Negroes" and estimated that half the violent crimes in areas occupied by "Mexicans, Greeks, Turks, Filipinos, Spaniards, Latin Americans, and Negroes may be traced to the use of marihuana."

Given this background, no one should pretend that marijuana prohibition was carefully considered or that it was driven by science, as opposed to ignorance and blind prejudice. It is hard to rationally explain why Congress, less than four years after Americans had emphatically rejected alcohol prohibition, thought it was a good idea to ban a recreational intoxicant that is considerably less dangerous.

It is relatively easy, for example, to die from acute alcohol poisoning, since the ratio of the lethal dose to the dose that gives you a nice buzz is about 10 to 1. According to the U.S. Centers for Disease Control and Prevention (CDC), about 2,200 Americans die from alcohol overdoses each year. By contrast, there has never been a documented human death from a marijuana overdose. Based on extrapolations from animal studies, the ratio of the drug's lethal dose to its effective dose is something like 40,000 to 1.

There is also a big difference between marijuana and alcohol when it comes to the long-term effects of excessive consumption. Alcoholics suffer gross organ damage of a kind that is not seen even in the heaviest pot smokers, affecting the liver, brain, pancreas, kidneys, and stomach. The CDC attributesmore than 38,000 deaths a year to three dozen chronic conditions caused or aggravated by alcohol abuse.

Another 12,500 alcohol-related deaths in the CDC's tally occur in traffic accidents, and marijuana also has an advantage on that score. Although laboratory studies indicate that marijuana can impair driving ability, its effects are not nearly as dramatic as alcohol's. In fact, marijuana's impact on traffic safety is so subtle that it is difficult to measure in the real world.

Last February the National Highway Traffic Safety Administration (NHTSA) released the results of "the first large-scale [crash risk] study in the United States to include drugs other than alcohol," which it described as "the most precisely controlled study of its kind yet conducted." The researchers found that once the data were adjusted for confounding variables, cannabis consumption was not associated with an increased probability of getting into an accident.

That does not mean stoned drivers never cause accidents. One challenge in assessing the extent of the problem is that many of the drivers who test positive for marijuana are not actually impaired, since traces of the drug can be detected long after its effects wear off. That means marijuana-impaired drivers get mixed in with drivers who happen to be cannabis consumers but are not under the influence while on the road, which would tend to mask the drug's role in crashes. Still, alcohol is clearly a much bigger factor in traffic fatalities.

Last year, during a congressional hearing on the threat posed by stoned drivers, a NHTSA official was asked how many traffic fatalities are caused by marijuana each year. "That's difficult to say," replied Jeff Michael, NHTSA's associate administrator for research and program development. "We don't have a precise estimate." The most he was willing to affirm was that the number is "probably not" zero.

The likelihood of addiction is another way that marijuana looks less dangerous than alcohol. Based on data from the National Comorbidity Survey, about 15 percent of drinkers qualify as "dependent" at some point in their lives, compared to 9 percent of cannabis consumers. That difference may be especially significant given the link between heavy alcohol consumption and premature death.

All told, the CDC estimates that alcohol causes 88,000 deaths a year in the United States. It has no equivalent estimate for marijuana. We may reasonably assume, along with Jeff Michael, that marijuana's death toll is more than zero, if only because people under the influence of cannabis occasionally have fatal accidents. But the lack of a definitive answer highlights marijuana's relative safety, which points to a potentially important benefit of repealing prohibition: To the extent that more pot smoking is accompanied by less drinking, an increase in cannabis consumption could lead to a net reduction in drug-related disease and death.

The comparison of alcohol and marijuana presents an obvious challenge to anyone who thinks the government bans drugs because they are unacceptably dangerous. If anything, that rationale suggests marijuana should be legal while alcohol should be banned, rather than the reverse. Judging from this example, the distinctions drawn by our drug laws have little, if anything, to do with what science tells us about the relative hazards of different intoxicants.


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Marijuana Prohibition Is Unconstitutional


When dry activists sought to ban alcoholic beverages, they went through the arduous process of changing the Constitution, which prior to the ratification of the 18th amendment in 1919 did not authorize Congress to prohibit the production and sale of "intoxicating liquors." When Congress banned marijuana in 1937, it did so in the guise of the Marihuana Tax Act , a revenue measure that authorized onerous regulations ostensibly aimed at collecting taxes on production and distribution, with severe penalties for noncompliance. But by the time marijuana prohibition was incorporated into the Controlled Substances Act of 1970, there was no need for such subterfuge. Instead Congress relied on its constitutional authority to "regulate commerce with foreign nations and among the several states."

The Commerce Clause, which was part of the original Constitution, did not change between 1937 and 1970. But beginning with a series of New Deal cases, the Supreme Court stretched its meaning to accommodate pretty much anything Congress wanted to do. In the 1942 case Wickard v. Filburn, for example, the Court said the Commerce Clause authorized punishment of an Ohio farmer for exceeding his government-imposed wheat quota, even though the extra grain never left his farm, let alone the state.

The Court went even further in the 2005 case Gonzales v. Raich, ruling that the federal government's power to regulate interstate commerce extends even to homegrown marijuana used for medical purposes by a California patient in compliance with state law. That decision, unlike Wickard, applied not just to production but to mere possession. According to the Court, the Commerce Clause encompasses the tiniest trace of marijuana in a cancer patient's drawer. "If Congress can regulate this under the Commerce Clause," observed dissenting Justice Clarence Thomas, "then it can regulate virtually anything—and the Federal Government is no longer one of limited and enumerated powers."

Many conservatives who pay lip service to the Constitution and the system of federalism it is supposed to protect nevertheless seem comfortable with this audacious assertion of congressional authority. In fact, they complain that the Obama administration is not using the Controlled Substances Act to shut down the newly legal marijuana markets in Colorado and Washington. Either they do not really believe in federalism or they cannot think straight when they smell marijuana.

Even if marijuana prohibition were consistent with science and the Constitution, it would be inconsistent with basic principles of morality. It is patently unfair to treat marijuana merchants like criminals while treating liquor dealers like legitimate businessmen, especially in light of the two drugs' relative hazards. It is equally perverse to arrest cannabis consumers while leaving drinkers unmolested.

Peaceful activities such as growing a plant or selling its produce cannot justify the violence that is required to enforce prohibition. In the name of stopping people from getting high, police officers routinely commit acts that would be universally recognized as assault, burglary, theft, kidnapping, and even murder were it not for laws that draw arbitrary lines between psychoactive substances.

The main justification for those laws is protecting people from their own bad decisions. The hope is that prohibition will deter a certain number of people who otherwise would not only try marijuana but become self-destructively attached to it. Toward that end, police in the United States arrest hundreds of thousands of people on marijuana charges each year—nearly 700,000 in 2013, the vast majority for simple possession. While most of those marijuana offenders do not spend much time behind bars, about 40,000 people are serving sentences as long as life for growing or distributing cannabis. And even if marijuana offenders do not go to jail or prison, they still suffer public humiliation, legal costs, inconvenience, lost jobs, and all the lasting ancillary penalties of a criminal arrest.

Note that the people bearing these costs are not, by and large, the people who receive the purported benefits of prohibition. The person who, thanks to prohibition, never becomes a pathetic pothead goes about his life undisturbed while other people—people who never hurt him or anyone else—pay for the mistakes he avoids. Even paternalists should be troubled by the distribution of these burdens.

I am not a paternalist, because I do not believe the government should be in the business of stopping us from hurting ourselves. I am with John Stuart Mill on this:

The only purpose for which power can be rightfully exercised over any member of a civilised community, against his will, is to prevent harm to others. His own good, either physical or moral, is not a sufficient warrant….Over himself, over his own body and mind, the individual is sovereign.

Marijuana prohibition, along with the rest of the war on drugs, is a flagrant violation of this principle. It is a moral outrage built on a mountain of lies.






Free Marijuana


For more information about marijuana see http://nexusilluminati.blogspot.com/search/label/marijuana
- Scroll down through ‘Older Posts’ at the end of each section


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Sunday, 15 March 2015

Smoking Marijuana Doesn’t Cause Crashes: Pot use doesn't increase crash risk


Smoking Marijuana Doesn’t Cause Crashes
U.S.: Pot use doesn't increase crash risk

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by David Shepardson


A government study released last month found no evidence that marijuana use leads to a higher risk of getting into a traffic crash.

But safety advocates believe it is still dangerous to drive after smoking significant amounts of marijuana, and the government plans more testing.

The National Highway Traffic Safety Administration said a 20-month survey of drivers in 2013 and 2014 found that while drinking dramatically raises the chance of a crash, there was no evidence that marijuana use is statistically significant in boosting wreck rates.

The agency said the issue is of growing importance in the wake of marijuana being legalized in Colorado, Oregon, Alaska and Washington state for recreational use.

In Michigan, eight cities approved decriminalization measures last year for marijuana: Berkley, Huntington Woods, Mount Pleasant, Pleasant Ridge, Port Huron, Saginaw, Oak Park and Hazel Park.

The report's findings were based on two surveys. The National Roadside Survey, which collected information from volunteer drivers at 300 research checkpoints across the U.S., and a second study — the largest of its kind ever conducted — that assessed whether marijuana use by drivers is associated with greater risk of crashes. That study, in Virginia, gathered data over 20 months from more than 3,000 drivers who were in crashes, as well as a comparison group of 6,000 drivers who did not crash.

The percentage of drivers with evidence of marijuana in their system increased from 8.6 percent in 2007 to 12.6 percent in the study, NHTSA said

Marijuana users were about 25 percent more likely to be involved in a crash than drivers with no evidence of marijuana use. But that's because other factors — especially that more younger men are involved in crashes, NHTSA said — rather than marijuana use itself.

By comparing marijuana use among those in crashes and those who weren't, the safety agency said "other factors, such as age and gender, appear to account for the increased crash risk among marijuana users."…

Mason Tvert, director of communications for the Marijuana Policy Project in Denver, added that the group doesn't want people driving after significant marijuana use.

"Nobody should drive while impaired by any substance, and that's why there are laws on the books to address it. While the research is pretty clear that marijuana use is not remotely as problematic as alcohol when it comes to driving, it can cause impairment. We need to have laws that are grounded in science and punish only drivers who were actually impaired. It's worth noting that there is also research that has shown people who have used marijuana are more likely to recognize if they are impaired than those who have used alcohol," he said.

But he said police often go too far.

"Arresting hundreds of thousands of people for simply possessing marijuana will not do anything to prevent people who make the mistake of driving under the influence. We would never approach the problem of drunk driving by making it illegal for adults to drink responsibly. It's just as foolish to do that when it comes to adults who use marijuana responsibly," he said.

It's difficult to determine at what level marijuana use may impair driving, the government said, because — unlike with alcohol testing — there aren't precise levels of chemicals from marijuana proven to correlate with impairment.


Drugged drivers


https://farm3.staticflickr.com/2897/14562211107_a99f774c72_k.jpgMichigan had the 12th highest rate of drugged drivers in the country from 2006-09, says the Substance Abuse and Mental Health Services Administration.

While all states prohibit driving under the influence of drugs, there's significant variation in the minimum acceptable levels of marijuana or its traces in a driver's system.

Sixteen states, including Michigan, forbid any presence of prohibited drugs, while five others have specific limits for marijuana. In October, Gov. Rick Snyder signed legislation allowing police to conduct a roadside analysis for drugs, in addition to alcohol.

Mothers Against Drunk Driving has made drug use behind the wheel a bigger focus. MADD this year changed its mission statement to include "help fight drugged driving."

"MADD hopes to bring awareness to the growing threat of drugged driving on our roadways, much in the same way we have with drunk driving since our founding in 1980," the group says on its website.

"While the substances are different, the results are the same — needless deaths and injuries."

NHTSA is conducting additional studies to further understand the risk of driving after drug use, including the Washington State Roadside Survey, "which will assess risk in a state where marijuana has recently been legalized."

It also is on board with the National Institute on Drug Abuse for a simulator study to assess how drivers under the influence of drugs behave behind the wheel, the agency said. Ongoing research, it said, "will refine our understanding of when marijuana use by drivers" increases the effect it has on driving.

"Researchers have developed a deep body of knowledge about the link between drinking, driving and risk. We know drunk driving kills," added NHTSA Administrator Mark Rosekind.

"The combined message of these two surveys is that our work to understand and combat drunk driving is paying off, but that we have much to learn about how illegal drugs and prescription medicines affect highway safety — and that developing that knowledge is urgent, because more and more drivers have these drugs in their systems."


Weekend numbers fall


As marijuana use behind the wheel is rising, the incidence of driving on weekends after drinking has fallen sharply.

The study said the proportion of drunken drivers on the roads has fallen by 80 percent since 1973. The study found about 1.5 percent of weekend drivers had blood-alcohol concentrations equal to being legally intoxicated, 0.08 percent or above.

The proportion of drivers with any alcohol in their system declined by about 30 percent from 2007 to 2014.

Drivers with a breath alcohol level of 0.08 percent were about four times more likely to crash than sober drivers, NHTSA said, while drivers with an alcohol level of 0.15 percent were 12 times more likely to crash than sober drivers.


From The Detroit News @ http://www.detroitnews.com/story/news/nation/2015/02/06/us-evidence-marijuana-leads-higher-crash-risk/23004549/


Marijuana and Driving:

A Review of the Scientific Evidence

 

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Cannabis and Driving by Norml









It is well established that alcohol increases accident risk. Evidence of marijuana’s culpability in on-road driving accidents is much less convincing.

Although cannabis intoxication has been shown to mildly impair psychomotor skills, this impairment does not appear to be severe or long lasting. In driving simulator tests, this impairment is typically manifested by subjects decreasing their driving speed and requiring greater time to respond to emergency situations.

Nevertheless, this impairment does not appear to play a significant role in on-road traffic accidents. A 2002 review of seven separate studies involving 7,934 drivers reported, “Crash culpability studies have failed to demonstrate that drivers with cannabinoids in the blood are significantly more likely than drug-free drivers to be culpable in road crashes.” This result is likely because subject under the influence of marijuana are aware of their impairment and compensate for it accordingly, such as by slowing down and by focusing their attention when they know a response will be required. This reaction is just the opposite of that exhibited by drivers under the influence of alcohol, who tend to drive in a more risky manner proportional to their intoxication.

Today, a large body of research exists exploring the impact of marijuana on psychomotor skills and actual driving performance. This research consists of driving simulator studies, on-road performance studies, crash culpability studies, and summary reviews of the existing evidence. To date, the result of this research is fairly consistent: Marijuana has a measurable yet relatively mild effect on psychomotor skills, yet it does not appear to play a significant role in vehicle crashes, particularly when compared to alcohol. Below is a summary of some of the existing data.

(For more information on NORML’s position regarding marijuana, driving and the law, please click here or visit NORML’s Principles of Responsible Cannabis Use.)



SUMMARIES

At the present time, the evidence to suggest an involvement of cannabis in road crashes is scientifically unproven.

To date ..., seven studies using culpability analysis have been reported, involving a total of 7,934 drivers. Alcohol was detected as the only drug in 1,785 drivers, and together with cannabis in 390 drivers. Cannabis was detected in 684 drivers, and in 294 of these it was the only drug detected.

... The results to date of crash culpability studies have failed to demonstrate that drivers with cannabinoids in the blood are significantly more likely than drug-free drivers to be culpable in road crashes. … [In] cases in which THC was the only drug present were analyzed, the culpability ratio was found to be not significantly different from the no-drug group.”

REFERENCE: G. Chesher and M. Longo. 2002. Cannabis and alcohol in motor vehicle accidents. In: F. Grotenhermen and E. Russo (Eds.) Cannabis and Cannabinoids: Pharmacology, Toxicology, and Therapeutic Potential. New York: Haworth Press. Pp. 313-323.

“Cannabis leads to a more cautious style of driving, [but] it has a negative impact on decision time and trajectory. [However,] this in itself does not mean that drivers under the influence of cannabis represent a traffic safety risk. … Cannabis alone, particularly in low doses, has little effect on the skills involved in automobile driving.”

REFERENCE: Canadian Senate Special Committee on Illegal Drugs. 2002. Cannabis: Summary Report: Our Position for a Canadian Public Policy. Ottawa. Chapter 8: Driving Under the Influence of Cannabis.

“This report has summarized available research on cannabis and driving.

… Evidence of impairment from the consumption of cannabis has been reported by studies using laboratory tests, driving simulators and on-road observation. ... Both simulation and road trials generally find that driving behavior shortly after consumption of larger doses of cannabis results in (i) a more cautious driving style; (ii) increased variability in lane position (and headway); and (iii) longer decision times. Whereas these results indicate a 'change' from normal conditions, they do not necessarily reflect 'impairment' in terms of performance effectiveness since few studies report increased accident risk.

REFERENCE: UK Department of Environment, Transport and the Regions (Road Safety Division). 2000. Cannabis and Driving: A Review of the Literature and Commentary. Crowthorne, Berks: TRL Limited.

“Overall, we conclude that the weight of the evidence indicates that:

1.    There is no evidence that consumption of cannabis alone increases the risk of culpability for traffic crash fatalities or injuries for which hospitalization occurs, and may reduce those risks.

2.    The evidence concerning the combined effect of cannabis and alcohol on the risk of traffic fatalities and injuries, relative to the risk of alcohol alone, is unclear.

3.    It is not possible to exclude the possibility that the use of cannabis (with or without alcohol) leads to an increased risk of road traffic crashes causing less serious injuries and vehicle damage.”

REFERENCE: M. Bates and T. Blakely. 1999. “Role of cannabis in motor vehicle crashes.” Epidemiologic Reviews 21: 222-232.

“In conclusion, marijuana impairs driving behavior. However, this impairment is mitigated in that subjects under marijuana treatment appear to perceive that they are indeed impaired. Where they can compensate, they do, for example by not overtaking, by slowing down and by focusing their attention when they know a response will be required. … Effects on driving behavior are present up to an hour after smoking but do not continue for extended periods.

With respect to comparisons between alcohol and marijuana effects, these substances tend to differ in their effects. In contrast to the compensatory behavior exhibited by subjects under marijuana treatment, subjects who have received alcohol tend to drive in a more risky manner. Both substances impair performance; however, the more cautious behavior of subjects who have received marijuana decreases the impact of the drug on performance, whereas the opposite holds true for alcohol.

REFERENCE: A. Smiley. 1999. Marijuana: On-Road and Driving-Simulator Studies. In: H. Kalant et al. (Eds) The Health Effects of Cannabis. Toronto: Center for Addiction and Mental Health. Pp. 173-191.

“Intoxication with cannabis leads to a slight impairment of psychomotor … function. … [However,] the impairment in driving skills does not appear to be severe, even immediately after taking cannabis, when subjects are tested in a driving simulator. This may be because people intoxicated by cannabis appear to compensate for their impairment by taking fewer risks and driving more slowly, whereas alcohol tends to encourage people to take great risks and drive more aggressively.”

REFERENCE: UK House of Lords Select Committee on Science and Technology. 1998. Ninth Report. London: United Kingdom. Chapter 4: Section 4.7.

“The evidence suggests that marijuana presents a real, but secondary safety risk; and that alcohol is the leading drug-related accident risk factor.”

REFERENCES: D. Gieringer. 1988. Marijuana, driving, and accident safety. Journal of Psychoactive Drugs 20: 93-101.


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CRASH CULPABILITY STUDIES


“For each of 2,500 injured drivers presenting to a hospital, a blood sample was collected for later analysis.

There was a clear relationship between alcohol and culpability. … In contrast, there was no significant increase in culpability for cannabinoids alone. While a relatively large number of injured drivers tested positive for cannabinoids, culpability rates were no higher than those for the drug free group. This is consistent with other findings.”

REFERENCE: Logan, M.C., Hunter, C.E., Lokan, R.J., White, J.M., & White, M.A. (2000). The Prevalence of Alcohol, Cannabinoids, Benzodiazepines and Stimulants Amongst Injured Drivers and Their Role in Driver Culpability: Part II: The Relationship Between Drug Prevalence and Drug Concentration, and Driver Culpability. Accident Analysis and Prevention, 32, 623-32.

“Blood samples from 894 patients presenting to two Emergency Departments for treatment of motor vehicle injur[ies] … were tested for alcohol and other drugs.

… Based on alcohol and drug testing of the full range of patients … alcohol is clearly the major drug associated with serious crashes and greater injury. Patients testing positive for illicit drugs (marijuana, opiates, and cocaine), in the absence of alcohol, were in crashes very similar to those of patients with neither alcohol nor drugs. When other relevant variables were considered, these drugs were not associated with more severe crashes or greater injury.

REFERENCE: P. Waller et al. 1997. Crash characteristics and injuries of victims impaired by alcohol versus illicit drugs. Accident Analysis and Prevention 29: 817-827.

“Blood specimens were collected from a sample of 1,882 drivers from 7 states, during 14 months in the years 1990 and 1991. The sample comprised operators of passenger cars, trucks, and motorcycles who died within 4 hours of their crash.

… While cannabinoids were detected in 7 percent of the drivers, the psychoactive agent THC was found in only 4 percent. … The THC-only drivers had a responsibility rate below that of the drugfree drivers. … While the difference was not statistically significant, there was no indication that cannabis by itself was a cause of fatal crashes.”

REFERENCE: K. Terhune. 1992. The incidence and role of drugs in fatally injured drivers. Washington, DC: US Department of Transportation National Highway Traffic Safety Administration, Report No. DOT HS 808 065.


ON-ROAD PERFORMANCE STUDIES

“Marijuana's effects on actual driving performance were assessed in a series of three studies wherein dose-effect relationships were measured in actual driving situations that progressively approached reality.

… THC's effects on road-tracking after doses up to 300 µg/kg never exceeded alcohol's at bacs of 0.08%; and, were in no way unusual compared to many medicinal drugs. Yet, THC's effects differ qualitatively from many other drugs, especially alcohol. Evidence from the present and previous studies strongly suggests that alcohol encourages risky driving whereas THC encourages greater caution, at least in experiments. Another way THC seems to differ qualitatively from many other drugs is that the formers users seem better able to compensate for its adverse effects while driving under the influence.”

REFERENCE: H. Robbe. 1995. Marijuana’s effects on actual driving performance. In: C. Kloeden and A. McLean (Eds) Alcohol, Drugs and Traffic Safety T-95. Adelaide: Australia: HHMRC Road Research Unit, University of Adelaide. Pp. 11-20.

“This report concerns the effects of marijuana smoking on actual driving performance. … This program of research has shown that marijuana, when taken alone, produces a moderate degree of driving impairment which is related to consumed THC dose. The impairment manifests itself mainly in the ability to maintain a lateral position on the road, but its magnitude is not exceptional in comparison with changes produced by many medicinal drugs and alcohol. Drivers under the influence of marijuana retain insight in their performance and will compensate when they can, for example, by slowing down or increasing effort. As a consequence, THC’s adverse effects on driving performance appear relatively small.

REFERENCE: W. Hindrik and J. Robbe and J. O’Hanlon. 1993. Marijuana and actual driving performance. Washington, DC: US Department of Transportation National Highway Traffic Safety Administration, Report No. DOT HS 808 078.

TABULATED SUMMARY OF ROAD TRIALS OF CANNABIS AND DRIVING
Table compiled by the UK Department of Transport (2000)




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DRIVING SIMULATOR STUDIES


“Overall, it is possible to conclude that cannabis has a measurable effect on psychomotor performance, particularly tracking ability. Its effect on higher cognitive functions, for example divided attention tasks associated with driving, appear not to be as critical. Drivers under the influence of cannabis seem aware that they are impaired, and attempt to compensate for this impairment by reducing the difficulty of the driving task, for example by driving more slowly.

In terms of road safety, it cannot be concluded that driving under the influence of cannabis is not a hazard, as the effects of various aspects of driver performance are unpredictable. However, in comparison with alcohol, the severe effects of alcohol on the higher cognitive processes of driving are likely to make this more of a hazard, particularly at higher blood alcohol levels.

REFERENCE: B. Sexton et al. 2000. The influence of cannabis on driving: A report prepared for the UK Department of the Environment, Transport and the Regions (Road Safety Division). Crowthorne, Berks: TRL Limited.

TABULATED SUMMARY OF SIMULATOR STUDIES OF CANNABIS AND DRIVING
Table compiled by the UK Department of Transport (2000)



From Norml @ http://norml.org/library/item/marijuana-and-driving-a-review-of-the-scientific-evidence


For more information about marijuana see http://nexusilluminati.blogspot.com/search/label/marijuana
- Scroll down through ‘Older Posts’ at the end of each section


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