Audi received the first permit self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads self-driving cars are already on public roads