It's actually 3x, not 2x. Probably why writers shouldn't express things this way, but it's clearer reading the article, this is a 200% increase, not that the rate is 200% of the normal rate.
Also, the link to the NHTSA doesn't work, but I'd be interested to read the primary research. Concern is they're just taking accident rates for sober drivers and BAC 0.08 drivers, which isn't a fair comparison because they aren't time matched. As in, drunk driving is a lot more likely to happen very late at night/early in the morning when bars close, when traffic is extremely low and accident rates are also very low. If your chances are 3x the chances of a person driving any time at all, you're much more than 3x the chances of someone driving unimpaired at 2 in the morning.
Of course, even if they time match the rates, there's still the reality that a lot of sober people driving at 2 in the morning are still impaired. Tired driving is also quite dangerous.
Also, the link to the NHTSA doesn't work, but I'd be interested to read the primary research. Concern is they're just taking accident rates for sober drivers and BAC 0.08 drivers, which isn't a fair comparison because they aren't time matched. As in, drunk driving is a lot more likely to happen very late at night/early in the morning when bars close, when traffic is extremely low and accident rates are also very low. If your chances are 3x the chances of a person driving any time at all, you're much more than 3x the chances of someone driving unimpaired at 2 in the morning.
Of course, even if they time match the rates, there's still the reality that a lot of sober people driving at 2 in the morning are still impaired. Tired driving is also quite dangerous.