&quot;Once computers drive the cars, the speed limit can be cranked up because reaction time goes up drastically and distracted drivers are nonexistent.&quot;<p>That doesn&#x27;t mesh with areas where robots have already taken over.  The robots moving freight around shipping terminals don&#x27;t move any faster than humans driving trucks.  The robots I see delivering drugs in hospitals don&#x27;t move faster than the nurses.<p>Speed limits aren&#x27;t just about the cars.  Noise and pedestrian safety are big factors.  There is no technology yet that can allow a robot to see around blind corners.  They may have a 1&#x2F;4second faster reaction time, but that won&#x27;t mean they could be trusted move much faster towards a crosswalk that might see a bike cross at any second.