Not everyone is fit to pilot a vehicle, sober or not. Some people lack the motor skills, cognitive performance or other functional attributes required for safe vehicle piloting. Legal marijuana poses additional challenges for keeping our roads safe while self driving cars offer a technological safety solution!
I lightly disassembled a USB charger
containing a single Lithium Ion 18650 3.6v
The 18650 battery is the building brick of an emerging super powerful electromotive industry and these same batteries are unlocking rooftop wind & solar systems with 24/7 output. Thank you Tesla Motors!