We also don't document their alcohol consumption - only when a car is pulled over on specific suspicion (modulo checkpoints). Perhaps a field test of some of t

We also don't document their alcohol consumption - only when a car is pulled over on specific suspicion (modulo checkpoints). Perhaps a field test of some of the markers shared by alcohol and drowsiness. Maybe test for micro sleeps, concentration, etc. similarly to how the effects of insufficient sleep are measured in a lab.