text: Time of day and day of the week for marijuana impaired fatalities compared to alcohol deaths is very interesting. Alcohol driving fatalities 11 to 3 am. - marijuana 4-8 p.m. If the cops are not out looking at the right time of day they will miss the majority of stoned drivers - average age of death is 16-34 for marijuana impaired drivers who die - but that only accounts for less than one third - of deaths - the rest are pedestrians, passengers, cyclists - innocent people in the wrong place at the wrong time.