Re: hazards of driving-- I'm eternally grateful that my husband, Peter, decided a year ago not to renew his license--not because of tremors, but other PD sysptoms--and I really think he LOVES being CHAUFFERED around! Seriously, we should always remind ourselves and our Parkies of the possible consequences to others, if not themselves, and if necessary, act FOR them in their own best interest, as your dad's accident demonstrates. It's hard--- Camilla Flintermann, Oxford,OH