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With Pot Legal, Scientists Study Detection of Impaired Drivers
Hugh Pickens writes "A recent assessment by the National Highway Traffic Safety Administration, based on random roadside checks, found that 16.3% of all drivers nationwide at night were on various legal and illegal impairing drugs, half them high on marijuana. Now AP reports that with marijuana soon legal under state laws in Washington and Colorado, setting a standard comparable to blood-alcohol limits has sparked intense disagreement. Unlike portable breath tests for alcohol, there's no easily available way to determine whether someone is impaired from recent pot use. If scientists can't tell someone how much marijuana it will take for him or her to test over the threshold, how is the average pot user supposed to know? 'We've had decades of studies and experience with alcohol,' says Washington State Patrol spokesman Dan Coon. 'Marijuana is new, so it's going to take some time to figure out how the courts and prosecutors are going to handle it.' Driving within three hours of smoking pot is associated with a near doubling of the risk of fatal crashes. However, THC can remain in blood and saliva for highly variable times after the last use of the drug. Although the marijuana 'high' only lasts three to five hours, studies of heavy users in a locked hospital ward showed THC can be detected in the blood up to a week after they are abstinent, and the outer limit of detection time in saliva tests is not known. 'A lot of effort has gone into the study of drugged driving and marijuana, because that is the most prevalent drug, but we are not nearly to the point where we are with alcohol,' says Jeffrey P. Michael, the National Highway Traffic Safety Administration's impaired-driving director. 'We don't know what level of marijuana impairs a driver.'"
According to NORML, what basically happens when someone is driving while on marijuana is that while they're somewhat impaired, they also drive more cautiously and leave more space around them. The net effect is that while they're annoying, they aren't all that dangerous.
By contrast, when someone is driving drunk, they tend to be both impaired and reckless. The net effect is that thousands of people each year are killed by drunk drivers.
I am officially gone from
Not entire US. Washington state and Colorado. The vote was part of the natoinal election 11/6/2012. It will take a while for it to meaningfully take effect, and with Federal government still classifying it as an illegal drug, we may get to see a nice states' rights case soon eough. I look forward to that as I always like to see the Federal government put in its place.
They didn't Decriminalize it; they LEGALIZED it.
There's a difference.
Now if any state had the testicular fortitude to challenge them over their utterly unconstitutional use of the threat of withholding federal highway funds from states that failed to raise the drinking age to 21, we might see a restoration of sanity in that direction as well.
A state did challenge the federal government over that very thing. It lost. The decision was 7-2, and with the current makeup of the Court it's unlikely that it would hear a similar case.