Thank you

With autonomous vehicles we could! You could safely bike coast to coast on the shoulder of any highway. The possibilities are truly spectacular.

Autonomous vehicles will not make cycling or walking next to much faster multi-ton vehicles more pleasant, even if those vehicles are less likely to kill you. I mean, have you walked along even a 35mph road with significant traffic? It's extremely unpleasant due to the noise and air pollution.

In fact, today the area around elevated freeways is often much cheaper than the surrounding area for several blocks.