Interesting article. One can easily notice that most folks seem to treat the speed limit as a minimum speed rather than a maximum speed. It's not just designers designing for speed. They do so because of market demand. That demand is boosted by advertising - both overt and culturally pervasive imagery. Buckle up folks. Try not to speed. You're really not saving much, if any, time. Also minimize left turns and lane changes. When you do turn (or change lanes) always use your turn indicator. When cars are robots they can do these things. The worry it that freedom loving consumers will still choose thrills over safety and this may stunt the adoption of robocars.