But those cars can drive in tandem. When humans drive, every start and stop has a delay between each driver, and inattentions compound those little delays. Addi

But those cars can drive in tandem. When humans drive, every start and stop has a delay between each driver, and inattentions compound those little delays. Additionally, traffic caused by rubbernecking, by trying to cheat lanes, by not zippering, by reaction inequities all are human problems.