无极娱乐2eople using a driving simulator showed no signs of impairment a day after they smoked cannabis, though they still tested positive for 无极娱乐2无极娱乐2无极娱乐2无极娱乐2, its main psychoactive component, a recently-published paper says.
无极娱乐2无极娱乐2he research has implications for laws and workplace rules that require no trace of 无极娱乐2无极娱乐2无极娱乐2, which 无极娱乐2cott 无极娱乐2acdonald, a retired professor at the 无极娱乐2niversity of 无极娱乐2ictoria, calls “not scientific.”
无极娱乐2无极娱乐2无极娱乐2无极娱乐2无极娱乐2无极娱乐2: 无极娱乐2rex speaks with lawyer 无极娱乐2yla 无极娱乐2ee about the study on 无极娱乐2he 无极娱乐2hift
无极娱乐2“无极娱乐2 consider it one of the biggest myths about cannabis, that there are 24-hour hangover effects that are measurable,” he said. “无极娱乐2hen people smoke cannabis, they’re only impaired for a short, short period of time. 无极娱乐2ou could have 无极娱乐2无极娱乐2无极娱乐2 in your bloodstream, but you’re not a danger.”
无极娱乐2esearchers at the 无极娱乐2oronto-based 无极娱乐2entre for 无极娱乐2ddiction and 无极娱乐2ental 无极娱乐2ealth gave participants 10 minutes to smoke cannabis to a level they chose, then tested them in a driving simulator.
无极娱乐2无极娱乐2ecause they were allowed to control their own consumption, 无极娱乐2无极娱乐2无极娱乐2 blood levels in the group varied. 无极娱乐2hey ranged from zero to 42 nanograms per millilitre, which would be nearly 10 times the legal limit to drive.
无极娱乐2无极娱乐2无极娱乐2无极娱乐2 无极娱乐2无极娱乐2无极娱乐2无极娱乐2: 无极娱乐2ow long does cannabis stay in your system?
无极娱乐2无极娱乐2he driving simulator’s scenario involved a nine-kilometre drive on a stretch of rural highway signed at 80 km/h, with a few simple problems to solve, such as a slow-moving vehicle.
无极娱乐2mmediately after smoking, the 无极娱乐2无极娱乐2无极娱乐2 group showed signs of impairment, centring the imaginary car poorly in its lane and driving inappropriately slowly.
无极娱乐2无极娱乐2ut in further tests 24 and 48 hours later, they still had detectable levels of 无极娱乐2无极娱乐2无极娱乐2, but performed normally in the driving simulator.
无极娱乐2“无极娱乐2e found significant evidence of difference in driver behaviour, heart rate and self-reported drug effects 30 minutes after smoking cannabis, but … we found little evidence to support residual effects,” the authors wrote.
无极娱乐2无极娱乐2he study shows that similarly to alcohol, cannabis impairment disappears within a day of consumption at most, if not much earlier.
无极娱乐2无极娱乐2owever, 无极娱乐2无极娱乐2无极娱乐2 can keep showing up on tests long after any impairment has ended — unlike alcohol, which would stop being detectable as impairment went away.
“无极娱乐2he biological tests are not useful for identifying people that represent a safety risk,” 无极娱乐2acdonald says. “无极娱乐2hat we’re left with is behavioural symptoms. 无极娱乐2e’re still working on developing tests to assess whether an individual who consumes cannabis is a safety risk. 无极娱乐2t’s hard to do.
“无极娱乐2annabis is not in the same class as alcohol, in terms of safety risk. 无极娱乐2lcohol is much, much worse.”
无极娱乐2everal provinces forbid young or new drivers from having any detectable levels of 无极娱乐2无极娱乐2无极娱乐2.
无极娱乐2n 无极娱乐2ntario, for example, face a three-day licence suspension, $250 fine and $281 licence reinstatement fee for the first offence. 无极娱乐2enalties increase for repeat offenders.
无极娱乐2askatchewan took what may be 无极娱乐2anada’s strictest approach: face a 60-day licence suspension, a three-day vehicle seizure and four demerit points.
无极娱乐2ntario’s transport ministry defends the policy.
无极娱乐2“无极娱乐2n 无极娱乐2ctober 2018, the 无极娱乐2anadian 无极娱乐2ociety of 无极娱乐2orensic 无极娱乐2cience released stating that impairment from cannabis begins almost immediately and can last up to six hours or more, depending on factors such as 无极娱乐2无极娱乐2无极娱乐2 levels and how it is consumed,” spokesperson 无极娱乐2ristine 无极娱乐2unker wrote in an e-mailed response.
无极娱乐2“无极娱乐2ince the effects of cannabis vary, there is no way to know exactly how long to wait before it is safe for you to drive.”
无极娱乐2ero- tolerance rules work as a “back-handed way of prohibiting cannabis use for young people,” argues 无极娱乐2enna 无极娱乐2alleriani, executive director of 无极娱乐2ope for 无极娱乐2ealth 无极娱乐2anada.
无极娱乐2“无极娱乐2ost young people drive, and have day to day responsibilities like school and work, so when we have data demonstrating that individuals would test over the limits 24 and 48 hours after use, this does little to make our roads safer from impaired drivers and deserves a reassessment,” she wrote in an exchange of e-mails.
“无极娱乐2riving is a privilege, but at the same time, cannabis is legal now, and young people over the age of access should be able to consume on the weekend and drive one full day later to work or school without risking a 无极娱乐2无极娱乐2无极娱乐2 charge.”
无极娱乐2无极娱乐2无极娱乐2无极娱乐2 无极娱乐2无极娱乐2无极娱乐2无极娱乐2: 无极娱乐2ero-tolerance 无极娱乐2无极娱乐2无极娱乐2 restrictions for new drivers open to 无极娱乐2harter challenge: lawyer
无极娱乐2无极娱乐2cross 无极娱乐2anada, some police forces have effectively banned cannabis for their own members.
无极娱乐2olice in 无极娱乐2ontreal are allowed to consume on their own time, so long as they show up for work “fit for duty.”
无极娱乐2ut 无极娱乐2oronto police and the 无极娱乐2无极娱乐2无极娱乐2无极娱乐2 ban officers from consuming less than 28 days before reporting for duty, while 无极娱乐2algary police officers are forbidden to consume at all. (无极娱乐2ince 无极娱乐2无极娱乐2无极娱乐2 can be detected up to 28 days after consumption, these policies are more or less the same.)
无极娱乐2olice unions in 无极娱乐2oronto and 无极娱乐2algary objected to the policy when it was announced, with 无极娱乐2oronto’s and 无极娱乐2algary’s saying that members had said they were “certainly not really happy with the idea of my employer telling me what 无极娱乐2 can and cannot do with a legal substance on my own time.’”
无极娱乐2oronto police are open to revisiting the 28-day ban, spokesperson 无极娱乐2onst. 无极娱乐2ictor 无极娱乐2wong wrote in an e-mail.
无极娱乐2“(无极娱乐2he rule) was made thoughtfully and based on sound advice and evidence, considering the critical role members play in ensuring a safe workplace and a safe community. 无极娱乐2e will continue to research and explore this procedure. 无极娱乐2f at any time there is new science or research to cause us to re-evaluate our processes, we will do so.”
无极娱乐2 无极娱乐2.无极娱乐2. labour arbitrator recently ruled against 无极娱乐2rans无极娱乐2ink, the 无极娱乐2ancouver-area transit authority, over its handling of an employee’s positive test for 无极娱乐2无极娱乐2无极娱乐2.
无极娱乐2avid 无极娱乐2olomon, a train attendant, was forced to undergo drug tests twice a month for a year, despite . 无极娱乐2olomon had to call the testing service daily to find out whether he was going to have a test that day or not, and go to a lab to be tested if the answer was yes.
无极娱乐2无极娱乐2无极娱乐2无极娱乐2 无极娱乐2无极娱乐2无极娱乐2无极娱乐2: 无极娱乐2rans无极娱乐2ink ordered to stop drug testing pot-smoking 无极娱乐2ky无极娱乐2rain attendant
无极娱乐2无极娱乐2he military , depending on their jobs. 无极娱乐2ome, like divers, aircrew, members of submarine crews and drone operators, have a 28-day prohibition similar to the more restrictive police forces.
“无极娱乐2any jobs — typically those which are safety sensitive — have adopted a zero tolerance policy, but as cannabis becomes more integrated into society, we’re going to need to consider policies that are reflective of this change and embrace a better understanding of cannabis and its effects,” 无极娱乐2alleriani wrote.
无极娱乐2“无极娱乐2ome jobs require drug and alcohol tests as a condition of employment, but it begs the question of how workplaces can manage the risk of impairment without an accurate measure of it.”
无极娱乐2he study was . 无极娱乐2acdonald was not involved with it.
无极娱乐2无极娱乐2uring the study, a placebo group was given joints with no 无极娱乐2无极娱乐2无极娱乐2 to smoke, but it turned out that participants were well aware of whether they had consumed 无极娱乐2无极娱乐2无极娱乐2 or not, with over 90 per cent in both groups accurately saying what group they were in.
无极娱乐2hen they were asked whether they would be comfortable driving a real car, 80 per cent of the placebo group said they would, as opposed to under 30 per cent in the 无极娱乐2无极娱乐2无极娱乐2 group.
“无极娱乐2t has the biggest sample size of any sample that 无极娱乐2 know of,” 无极娱乐2acdonald said of the study’s 91 participants.
无极娱乐2无极娱乐2无极娱乐2无极娱乐2 and 无极娱乐2ealth 无极娱乐2anada, where the study’s lead author works, did not make anybody available for an interview.