Is that required by law? FTA &#x27;&quot;We&#x27;ve capped the speed of our prototype vehicles at 25 mph for safety reasons,&quot; the post explained. &quot;We want them to feel friendly and approachable, rather than zooming scarily through neighborhood streets.&quot;&#x27;<p>Sounds like Google&#x27;s decision to me. Either way, it&#x27;s not a highway, so that section seems irrelevant. And &quot;in compliance with the law&quot; is quite a broad redirect.