quote: It's already illegal to drive with blood alcohol over .08%, but I'm willing to bet that the vast majority of fatalities are caused by people whose blood alcohol is far higher than that.
quote: The laboratory and driving simulator research described above provides insights into alcohol ’s effects on general performance; however, with respect to safety, studies that consider the relationship between BAC and crash risk can provide useful information to guide policy. One of the earliest and best known studies of the effects of BAC on crash risk was the Borkenstein Grand Rapids study, a case - control study conducted in the early 1960s (Borkenstein and others 1964). The Borkenstein study showed an increased risk of crashes beginning at a BAC of 0.04. At a BAC of 0.08, risk was nearly doubled, and at 0.10, it had increased six fold. The Borkenstein study also found a “dip” in risk at very low BAC levels; 23 however, subsequent replications have indicated that the dip was a statistical anomaly (Hurst , Harte, and Frith 1994, 647 – 54) and that risk increases continuously beginning at a BAC of 0.01. More recent studies have shown that risk is significantly higher when a driver’s BAC is = 0.05, and that crash risk climbs rapidly at BAC levels that exceed 0.08. One study found that the risk of fatal crash involvement at BACs between 0.05 0 and 0.079 ranged from about 3 to 17 times greater, depending on the age of the driver and the type of fatal crash (single - vehicle versus all crashes) ( Zador , Krawchuk, and Voas 2000, 387 – 95 ). Another study found that at a BAC of 0.05, drivers are 1.38 times more likely to be in a crash than are sober drivers. At a BAC of 0.08, crash risk is 2.69 times higher ( Compton and others 2002; Blomberg and others 2005). These elevated risks grow even higher as BACs increase, with the risk of being in a crash rising to nearly 5 times higher by a BAC of 0.10. Figure 4 depicts relative crash risk by BAC level from this study.
quote: And their stated goal is zero impairment.
quote: I see nothing in the source article that defines that term, and nothing that can be used to say "People with a BA level above 0.05 and below 0.08 kill X number of people each year in accidents."
quote: At .08, you are impaired but it's not that significant
quote: Although lowering the per se BAC threshold may seem counterintuitive when the majority of alcohol - impaired drivers in fatal crashes have BAC levels well over 0.08, research on the effectiveness of laws limiting BAC levels (Hingson, Heeren, and Winter 1996; Wagenaar and others 2007) has found that lowering the per se BAC limit changes the drink - driving behavior of drivers at all BAC levels. Consequently, reducing the per se BAC limit could reasonably be expected to have a broad deterrent effect, thereby reducing the risk of injuries and fatalities from crashes associated with impaired driving.
quote: The psychological effect is something I hadn't considered, but it's not something that can be predicted effectively either, just "estimated". The only way to really know the impact of that aspect would be to implement the law...
quote: I think they should raise the tobacco and alcohol age.
quote: I even the driving age from 16 to 18.