Earlier quoted context omitted.
You can pry my human-driven gas-burning vehicle out of my cold dead hands.
You can keep the car and drive it on your farm. But as to public roads, they're a limited public resource, and the government has an obligation to ensure they are utilized as efficiently as possible. That will be achieved by only allowing self-driving cars.
I used to live somewhere I could drive the 12 miles to work without seeing another car. Telling people around there that they can't have their trucks because roads are a limited resource, would go over like a fart in a spacesuit.