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 math comes around.
21 + 16 - 7 - 4 = 26
This sign is located in the Salt River Canyone in Arizona. See sign on map!
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