I was just thinking about this today. My proposal was to replace them with behavioral nudges[0]. Things like &quot;Traveling the speed limit saves X lives and gets you home faster[1].&quot; Basically, they&#x27;d be gentle ways of making people more conscious and aware of the road and themselves.<p>But of course, who gets to pick what the billboards say? And I&#x27;m sure nobody would go for it if it were slogans from the State Dept. of Nudges...<p>[0] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Nudge_(book)" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Nudge_(book)</a><p>[1] Real data of course. Citations needed.