Madrid Math

Madrid Math
Found by	Rodrigo.mendez
City	Armuña de Tajuña
County	Guadalajara
State	Castille-La Mancha 180x180px
Country	Spain
First in region	True
Posted on	2005/09/16
Map Location	40° 30' 21.2", -3° 3' 8.1"
Numbers	5, 1, 2
Type	Advanced
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Continuing a run of four 4, 2 mathematically significant roadsigns is this great submission from Spain by RMC. Road Sign Math appears to be a universal language. While traveling on M-40, which rings Madrid, he found this winner on a gantry over the road. He whipped out his camera phone and snapped this picture while driving.

We seem to be stuck for a moment on this basic equation (Kettle Creek, North Dakota Root, Odd Little Sign) and now Spain.

$\sqrt{5 - 1} = 2$

This sign is found on M-40, in the east sector, heading north.