Waymo (prev. Chauffeur) were cruising freeways long before they were doing city streets. Problem was that you can't do revenue autonomous service with freeway-o

Waymo (prev. Chauffeur) were cruising freeways long before they were doing city streets. Problem was that you can't do revenue autonomous service with freeway-only driving. The real reason I see for not running freeways until now is that the physical operational domain of for street-level autonomous operations was not large enough to warrant validating highway driving to their current standard.