The obvious solution is to charge a small amount for road usage in places where roads are congested. This doesn't even have to apply to human driven cars if ci

The obvious solution is to charge a small amount for road usage in places where roads are congested. This doesn't even have to apply to human driven cars if cities don't want it to (although it of course should for efficiency's sake). Self driving cars will need the ability to be pulled over by police, so at the least you can just give out big tickets to driverless cars that aren't paying the congestion fee when they are pulled over.