Road Sign Math

Gerald Thurman snapped this sign leaving Mesa, Arizona on Bush Highway heading up over Usery Park.

Mr. Thurman applies some nice math to get this winner.
\sqrt{87 - 14 + 10 - \sqrt{4}} = 9
This sign is on Bush Highway heading northbound out of Mesa, Arizona. See sign on map!

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Gerald Thurman grabbed this sign while browsing the Maple Ash neighborhood in Tempe, Arizona.

Mr. Thurman stacks square roots on top of square roots to create a mathematical pyramid that a high school cheerleading squad would be jealous of.
\sqrt{\sqrt{20 - \sqrt{\sqrt{1600} - 24}}} = 2
This sign is on S. Ash Avenue near W. 10th Street [...]

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Gerald Thurman found this sign on the lesser traveled roads of Arizona.

Mr. Thurman applied some quick ratios and figured he was close to a special constant.
{{504 + 1}\over{260 + 52}} \approx 1.61858974 \approx \varphi
This sign is located in Arizona’s Rim Country. See sign on map!

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Gerald Thurman accomplishes a first ever in Road Sign Math! He has found a pi sign, and by inserting himself into the picture he put the entire solution right there. Mr. Thurman found this sign on Pi Day (March, 14th) 2006.

While a bit pedestrian, we still get excited about the most commonly used pi solution [...]

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Gerald Thurman shows us a sign leading to a big house.

Mr. Thurman neatly uses a factorial to bring this one home.
(10 - 6)! = 24
This sign is on prime-numbers highway 587 near it’s juncture with highway 87 just south of Chandler, Arizona. See sign on map!

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Gerald Thurman expands on the select few signs on Road Sign Math that are wooden. It’s a nice break from the green, metal of the urban landscape to get into the outdoors a bit. This sign guides visitors to Salt River Canyon in Arizona.

This sign is also impressive due to the direct way the [...]

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Gerald Thurman “v discovered” this mathematically significant “v roadsign” while driving to Mormon Lake.

Mr. Thurman gets to the “v relationship” here.
1 + 5 + \sqrt{9} = \sqrt{81}
This sign is located on Coconino county road 3 heading north to Mormon Lake, Arizona. See sign on map!

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Gerald Thurman puts another mathematically significant roadsign on the map for the great state of Arizona. Mr. Thurman notes that this picture was taken on Presidents Day, however there is no apparent connection between that day and the math herein.

Most people would pass this sign by. They would add up 32 and 34 and [...]

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Gerald Thurman brings us this sign from the neighborhoods of Tempe, Arizona.

Some big numbers here that come together amazingly well.
11 \times 100 = 1,100
This sign is located in the Maple Ash neighborhood of Tempe, Arizona. See sign on map!

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Gerald Thurman brings us this sign from Tempe, Arizona. Tempe now joins the other ranks of cities welcoming people with Math to their great city.

The math doesn’t get simpler than this.
1 + 2 = 3
This sign is Tempe, Arizona on Loop 202. See sign on map!

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