It was something I made up. The rulemakers would allow your car to drive at a MUCH higher speed than allowed by "human" driving. and it would maintain the spe

It was something I made up. The rulemakers would allow your car to drive at a MUCH higher speed than allowed by "human" driving. and it would maintain the speed. The cars would perfectly merge in and out, maybe including perfect metering or buffering of cars exiting. They would drive at a specific distance from each other and speed up and slow down synchronously. oh, and don't charge for it.