Many states (including Kansas, where I used to live) have enforceable minimums as well as maximums on major highways. All states can pull over and ticket vehicles for, in the judgment of an officer, traveling at a speed slow enough to be unsafe (witness the stories a little while back about self-driving cars getting into trouble for obstructing traffic by being too slow). In recent years there&#x27;s been a big push to begin enforcing this on highways, largely because of the rise of road-raging self-appointed &quot;enforcers&quot; who try to force other traffic to obey their personal interpretations of traffic laws.<p>And in all 50 states it is now some type of infraction to be anywhere but the rightmost lane when travelling slower than other traffic, even if by &quot;slower&quot; you mean &quot;exactly the posted limit&quot;. This year-old article has some notes on the left-lane stuff, including the fact that yes, you could be ticketed for doing 65 in a 65 if the passing traffic is doing 80 and your slower driving is interfering with that:<p><a href="http:&#x2F;&#x2F;www.vox.com&#x2F;2014&#x2F;6&#x2F;16&#x2F;5804590&#x2F;why-you-shouldnt-drive-slowly-in-the-left-lane" rel="nofollow">http:&#x2F;&#x2F;www.vox.com&#x2F;2014&#x2F;6&#x2F;16&#x2F;5804590&#x2F;why-you-shouldnt-drive-...</a><p>And also points out what was already well-known to everyone except vigilante traffic rangers: that doing only the speed limit, when everyone else is faster, is demonstrably unsafe.