My son with a high functioning form of autism rides his bike everywhere during the warm months, including work. It's good exercise. In winter he often walks. We don't have public transportation here. We do have discounted cab rides for the disabled.
I don't think drug users should get behind the wheel of a car. It's dangerous to them and to others on the road. My daughter was forbidden from our cars after her first accident. She had two others
Car accidents, driving friends cars. Sending peers lady $14,000 in personal injury costs. After she was clean for two years her father paid whatever was left of the debt, not until. At least we didn't carry the guilt of allowing her to drive our cars and harming somebody!
A lot is at stake if your child uses and drives, if you aren't rich. Also deaths of others can cause lifelong guilt. Drugs and driving is a serious combination.