99 year old on wrong side of road and no headlights in RV

My father had the attention span of a goldfish but he could pass any test Calif gave him. I finally hid his car keys and left him the telephone number of local cab company and a couple hundred bucks. He eventually found a way to start his car and ended up running through the front window of Denny's mistaking the gas pedal for the brake. Thankfully nobody was hurt but himself - he broke his hip and that was the beginning of the end. States need to step up and do a better job of testing.