Presidential Addition

Just down the road from Flashing Root, on highway 16, is another mathematically significant roadsign bringing the Coyote state, South Dakota, into Road Sign Math. Randy Weiss found this sign that pays an ode to the presidents and their dedication to mathematics in a way that the Office of Management and Budget never could.



The math in this sign is great. Simple, straightforward and stunningly obvious.

$$10 + 12 = 22$$

This sign is found US 16 heading eastbound as it joins US 385.