Yes, and in states with a 'basic speed law', or similar, you can even earn a ticket for driving substantially below the posted speed limit. The Utah driver's h

Yes, and in states with a 'basic speed law', or similar, you can even earn a ticket for driving substantially below the posted speed limit. The Utah driver's handbook and license test, for instance, explicitly call out that road conditions may be such that the maximum safe speed is 0 mph.