North Dakota Root

North Dakota is the home of the founder of Road Sign Math. It is with great pleasure, and difficulty, that North Dakota makes it's debut with a mathematically significant roadsign. After driving for nearly one thousand miles through North Dakota and not seeing a single sign that had a mathematical relationship it was a delight to finally find a sign, however lacking in glamour, that was a winner! This very flat, and somewhat barren state, seems to be challenging to those that live in it as well as those that seek mathematics inside of it.



Continuing it's popularity the square root function shows up again. While this is a rather "plain Jane" sign, it was still very exciting to find after hours of searching.

$$\sqrt{4} = 2$$

This sign is found on US-2 heading east towards Grand Forks where it intersects with highway 18, providing a connection to county road 4.