Wrong.  One  can  drive  under  the  influence  of  alcohol.  It's when  you're   over .08 ( lesser amount when one can prove lesser amount still impaired ). One can also drive under the influence of pot. In Nevada automobile manslaughter caries a maximum one year. A female was facing 6 ( 7 ) years max for falling asleep, running off the road and killing 6 ( 7 ) children doing mandatory community service picking up trash on the highway. She received 120 ( 140 ) years because she smoked pot. She was never given a field  sobriety test. She barely registered positive for pot ( -5 nanograms ).Never mind that 1200 people were CITED for falling asleep and running off that road in 10 years. Does Alaska have a threshold ?