There is help for your father, and more importantly, for you. Please look up this site :
Welcome to Al-Anon and Alateen
It's al-anon, and al-ateen. It is a support group for family members of alcoholics. You see, I too am an alcoholic/addict, yet in full recovery. This group is "kin" to Alcoholics Anonymous, and really works wonders. My wife is in Al-anon. It probably is the main reason I sought help. AA/NA(Narcotics Anonymous) has saved my life, my family, and my sanity. Please look it up. There is a meeting near you tonight. It's free, anonymous, and worldwide.
Your father is not going to get help until he hits rock bottom. That's the way this disease works. Yes, it is in fact a disease.
Please do not hold it against your father, or think his drinking somehow has anything to do with you. Some people want to drink, your father simply MUST drink. He is not a bad person is he? He is a sick person who needs help. He must find that out for himself. Maybe you and some other family members and friends, can do an intervention. He needs to see how his behavior is affecting you, and the others who love him.
Yes, he most definitely should not have driven with you in the car. He needs to get help fast.
I wish you the best.