What Should The BAC Limit Be?

It is long past time to revisit the issue of BAC limits for driving once again, specifically for small amounts of alcohol, as it is already obvious for larger amounts.

Twenty-One Debunked believes that, in a perfect world, no one would ever dare to get behind the wheel after having even the slightest amount of alcohol in their system, period.  We would also have safe self-driving cars and state-of-the art public transportation, streets would be designed to maximize safety for all users rather than the convenience of only some users, and so on.  But unfortunately, we don't live in a perfect world.  And we never will either.  Think protopian, not utopian.

Thus, we need to be realistic in terms of what sort of BAC limits and penalties we set. Note that the swiftness and certainty of punishment is far more effective than severity.  And we need to prioritize getting actual drunk drivers off the road above all.  Focus on the sharks, not the guppies or dolphins. 

Borrowing from Denmark, one of the heaviest drinking cultures in the world and not even remotely a temperance society, we currently believe that the per se legal limit should be 0.05% in general, and 0.00% if observed to be driving recklessly.

Borrowing from most of Canada, we believe that only a BAC above 0.08% should carry  criminal charges, and 0.05% to 0.08% should be only a traffic violation with a brief administrative license suspension and brief vehicle impoundment and a modest fine.  For novice drivers of any age with less than two consecutive, accident and violation-free years of licensed driving, or under 21, whichever is longer, the BAC limit should be either 0.00% or 0.02%, also a traffic violation less than or equal to that above 0.05%.

If the limit is officially set to 0.00% for effect, any test result below the limit of quantitative (LOQ) must be treated as a presumptive zero (by that, I mean a conclusive presumption).  If it is a handheld breathalyzer device, or if the LOQ is unknown for the instrument, any result below 0.02% shall be a presumptive zero.  And all failing breathalyzer results should be confirmed on a second device.

Penalties should be graduated.  For those with above 0.08% but below 0.15%, a first offense should be a misdemeanor, in addition to any administrative license revocation.  There can also be an option to proceed only administratively and thus summarily.  Repeat offenses above 0.08%, or any offenses above 0.15% (or "aggravated DUI"), and/or with any kids under 16 in the car and/or when a serious accident occurs, should be automatic felonies with stiff sentences and heavy fines that can only be downgraded upon successful completion of an alcohol treatment program, that is, the classic "felony hammer".  And license revocations after the second offense above 0.08% need to be (more or less) permanent.  No more people still driving after their second, third, fourth, or fifth (!) DUI, ever again.

And those who drunkenly kill or maim innocent people, well, they need to go away for a very, very long time.  No excuses.  Do the crime, do the time.

And enforcement of these BAC limits should be done not only with checkpoints, but also with roving patrols as well, including the back roads especially.  And also use the "fish in a barrel method" in the parking lots of bars and clubs too.  We need to get these ticking time bombs off the road, yesterday.

So what are we waiting for?

Does Lowering BAC Limit To 0.05% Actually Save Lives? (Part Deux)

TL;DR version:  It depends.

We at Twenty-One Debunked have long supported (and still support) lowering the legal BAC limit for DUI/DWI to 0.05%, with nuance and graduated penalties, based on what we thought was rock-solid research supporting such a move from the current 0.08% limit in most of the USA.  Indeed, most countries that have a limit (all but USA, England, Wales, Northern Ireland, and the Cayman Islands) currently set the limit at 0.05%, and some even lower.

However, last year we also noted that a pair of more recent British studies cast serious doubt on whether such a move will actually save any lives at all by itself.  Those studies found that Scotland lowering their BAC limit from 0.08% to 0.05% in 2014 did not appear to show any net reduction in traffic crashes or fatalities relative to England and Wales (who kept their BAC limit at 0.08%), and in fact Scotland showed a small but significant net increase.  Whoops!  The lack of any detectable lifesaving effect (and perhaps even a perverse effect) in Scotland was of course chalked up to weak enforcement and insufficient alternatives for transportation, and that may very well be true.  But hey, at least they didn't show any significant negative economic impacts (e.g. on the hospitality industry) as some had predicted.

Contrast this with Utah's experience, being the only US state so far to lower their per se BAC limit from 0.08% to to 0.05%.  When they lowered their limit in 2018, they saw a 19.8% drop in their fatal crash rate and an 18.3% drop in their fatality rate by 2019, which was significantly greater than for neighboring states or the nation as a whole.  More people apparently chose to plan ahead when going out drinking.  And yet like Scotland, they did not see any negative economic impacts either.

So why such a difference between Utah and Scotland?  Well, to ask the question is to answer it:  it's pretty clear which of the two has the bigger and more legendary drinking problem overall.  And combine that with relatively weak enforcement and poor alternatives for transportation, and it really doesn't take a rocket scientist to see why.

And the difference is notably NOT due to Utahns under 21 either, as drivers under that age were already long covered by their strict zero tolerance law, which has no equivalent in the UK where not only is the drinking age 18, but also their BAC limit applies equally to all drivers regardless of age or license duration.  So in Utah, the change effectively only applied to drivers over 21, while in Scotland, it applied to all drivers.  Thus, Scotland should have seen a larger effect than Utah, but they did not.

We clearly need to see the forest for the trees.  While 0.05-0.08% does indeed significantly increase the risk of crashing for most people, the vast majority of alcohol-impaired driving casualties are nonetheless from drivers with much, much higher BACs.

Recall, as Darren Grant noted in his famous study debunking the effectiveness of zero tolerance BAC laws for people under 21, it should really come as no surprise to an economist, who is used to thinking on the margin.  While driving impairment indeed begins long before reaching 0.08% or even 0.05%, it rises exponentially with each drink.  Thus, higher BACs are exponentially more dangerous than lower ones.  And the decision to have one's next drink based on trying to stay within the legal limit, even if a lower limit had the same deterrent effect at that limit, would have exponentially less effect that the decision not to cross a higher threshold.  (If anything, it's even MORE exponential for younger drivers, not less.)  And apparently once when the limit goes down to below 0.05%, any additional lifesaving effect over and above lowering the limit to 0.08% or 0.05% simply gets lost in the statistical noise.  That is especially true if the penalty is the same for crossing a lower threshold, since there is literally no marginal deterrence effect against each additional drink beyond that threshold.

(Grant also did a sort of sequel to that study in 2016, again drawing similar conclusions.)

We already know that the vast, vast majority of DUI casualties are concentrated among extremely high BAC drivers, usually 0.15%+ (average 0.16%) and often ones who do so repeatedly and frequently.  These drunk drivers are sometimes called "hardcore" drunk drivers, and are the most resistant to changing their behavior.  And most of those are in fact alcoholics to one degree or another.  They would, of course, laugh at the idea of a BAC limit being lowered to 0.05%, or at the very least, wouldn't exactly agonize over it.  This is all common knowledge, and not at all controversial, except of course among MADD and similar zealots.

Thus, if we as a society decide to set the BAC limit at 0.05%, or indeed any number below 0.08%, there should be steeply graduated penalties, with 0.05% (or 0.02% for young or novice drivers) being a mere traffic violation with a modest fine and short-term license suspension, and no criminal record, 0.08-0.10% being a misdemeanor with a steeper fine and longer license suspension or revocation, 0.10-0.15% being misdemeanor with an even steeper fine and even longer license revocation and mandatory jail time, and 0.15%+ being a felony with permanent or semi-permanent license revocation, very steep fines, vehicle forfeiture, and a stiff prison sentence.  Repeat offenses of 0.08% or higher would carry the same penalties as a 0.15%+ BAC, as would driving above 0.08% with a child under 16 in the vehicle.

Denmark, one of the most liberal drinking cultures in the world, has the BAC limit at 0.05% in general, but zero if not driving safely.  Penalties are at least largely graduated as well.  And that is for all drivers.

We also know that swiftness and certainty of punishment, or the perception of such, is a far greater deterrent than severity.  Thus, automatic administrative penalties, separate from any criminal penalties, are found to be more effective that any criminal laws on the books, most notably in the Canadian provinces of British Columbia and Alberta.

Of course, we would be remiss if we did not discuss the stunning success of special DUI/DWI courts.  These are diversion programs that allow DUI offenders to plead guilty and complete coerced treatment and enforced abstinence from alcohol instead of jail or other penalties.  And they work quite well, with far lower recidivism rates than for those who do not enter such programs.  There are two types of DUI offenders these days:  1) relative normies who simply make dumb decisions and can be "scared straight", and 2) hardcore drunk drivers.  And DUI courts actually get to the root of the problem for the latter.

But first, we need to get these ticking time bombs off of the roads before they kill or maim innocent people.  Australian-style random breath testing (RBT) is one blunt way to do it, but that would not likely pass constitutional muster in the USA. And even then, the long-run effects of Australia's RBT were not very different than those of American-style sobriety checkpoints when studied in the 1980s.  Tougher and sustained enforcement in general really seems to be the key.  And that can of course be done more effectively and cost-effectively with roving and saturation patrols, that look for signs of actually impaired drivers on the roads.  Especially in the many states that do not allow sobriety checkpoints to take place, they HAVE to rely on DUI patrols instead.

(Twenty-One Debunked recently came up with an ingenious idea to turn roving and saturation police patrols against DUI into a COPS-like reality TV show called "Operation Rovin' Eyes", complete with ride-alongs for community members as well.)

Seasoned drunk drivers know how to avoid the checkpoints with ease.  But with roving and saturation patrols, they will soon learn (either the easy way, or the hard way) that you can run, but you can't hide.  "Roving eyes...are watching YOU!" would be a good slogan to publicize the program.  The "fish in a barrel" method, that is, parking a police car outside bars, clubs, or parties and catching would-be drunk drivers before they get on the road, would also be a great complement to such patrols as well.

And while we're at it, let's get all of the garden-variety reckless, negligent, and distracted drivers off the road as well.  The same patrols will of course get them too.

It's time to stop tilting at proverbial windmills, and finish the job for good.  So what are we waiting for?

What Should the BAC Limit Be?

Recently there has been a push to lower the BAC limit for DUI to 0.05 from its current 0.08.  The National Transportation Safety Board (NTSB) estimates that it would save 1000 lives per year.  This idea is not without controversy, and Twenty-One Debunked is clearly no stranger to controversy.  So is it a wise idea?

First, let's examine the evidence.  It is clear that most drivers are significantly impaired at a BAC of 0.05-0.08, with at least a fourfold increase in fatal crash risk compared to zero BAC, even though this impairment can be rather subtle.  For young male drivers, this relative risk increases to tenfold.  Most civilized countries (and the state of New York) recognize this fact and have thus set their BAC limits at 0.05, and some have set it even lower still.  And doing so has been shown to save lives, even in car-cultures like Australia who saw more progress in reducing alcohol-related traffic deaths than the USA or Canada.  To reach a BAC of 0.05, it would take about three drinks for a 180-pound man or about two drinks for a 120-pound woman within an hour or two.  So contrary to popular opinion, a 0.05 limit would NOT criminalize having a drink with dinner at a restaurant and subsequently driving home.  Thus, on balance, the benefits of lowering the limit outweigh the costs, and it is most likely a good idea overall.

That being said, Twenty-One Debunked does NOT support making it a criminal offense to drive with a BAC of 0.05-0.08.  Rather, we favor the approach taken by the Canadian provinces of British Columbia and Alberta, as well as some Australian states.  In these jurisdictions, driving with a BAC of 0.05-0.08 is illegal but is only a traffic infraction, with administrative rather than criminal penalties.  Only above 0.08 would a driver face criminal penalties.  Administrative penalties include immediate short-term license suspension, short-term vehicle impoundment, and fairly modest fines for those who fail or refuse a breathalyzer.  Our proposal already includes these ideas, along with tougher enforcement and graduated penalties based on BAC and number of offenses.  We believe that if all or even some of the ideas in our proposal were implemented, alcohol-related traffic deaths and other problems would decrease dramatically in a fairly short time.

Finally, we should note that MADD founder (and later turncoat) Candy Lightner is against lowering the BAC limit to 0.05, about as strongly as she supports keeping the drinking age 21.  Remember that in 2008 she even insulted our men and women in uniform on national TV just to make a point about why the drinking age should be 21 in her view.  That is truly the height of hubris and hypocrisy, and you don't get much more pharisaical than that.   And ironically even MADD itself, who Lightner has apparently made peace with, isn't too keen on the 0.05 limit either. 

MADD and their ilk have historically claimed that if a particular policy saves even one life, it's worth it.  Funny how they would oppose (or at least not push for) a policy that would likely save at least as many lives as their own (bogus) estimate of lives saved by the 21 drinking age.  That really speaks volumes about what they really are--an anti-youth hate group that really has no place in a civilized society but on the trash heap of history.