Uber is applying for a patent that would help detect if someone (a rider) is drunk before they get in an Uber. They think they can tell this through the persons phone, what they are doing on the phone, how they are holding their phone, etc. This would then lead Uber to only match up drunk passengers with certain drivers who have training/also send a warning to the driver.
Uber wants to be able to detect if you are drunk BEFORE they match you with a driver.
travel. travel. travel.