This road sign was found at the 7th St. Exit of northbound I-17 in Phoenix, Arizona.

The road sign says...

+--------------------+ | 7th St 1/4 | | Central Ave | | 7th Ave 1 1/4 | | 19th Ave 2 1/4 | +--------------------+the numbers are: 7 (1/4) 7 (1 1/4) 19 (2 1/4) the Phi math is: (sqrt(19 - 7 - 7) + ((2 1/4) - (1 1/4))) * sqrt(1/4) = Phi observe... sqrt(19 - 7 - 7) = sqrt(5) 2 1/4 - 1 1/4 = 1 sqrt(1/4) = 1/2 (sqrt(5) + 1) * 1/2 = Phi = 1.61803399+ the Pi math is: (19 + 7 - (sqrt(1/4) + (1 1/4) + (2 1/4))) / 7 = Pi (3.14) observe... sqrt(1/4) = 1/2 1/2 + 1 1/4 + 2 1/4 = 4 19 + 7 - 4 = 22 22/7 approximates Pi truncated to 2 decimal digits## Update::2008.05.22

A similar, yet different, road sign was seen on westbound I-10 in Phoenix.

BARS::7th St., 7th Ave., 19th Ave. on I-10 West in Phoenix, Arizona

The following road sign/highway evaluation was discovered while updating this BARS.

again, the numbers are: 7 (1/4) 7 (1 1/4) 19 (2 1/4) rsHwyEval: 19 + 7 - 7 - sqrt((2 1/4) + (1 1/4) + sqrt(1/4)) = 17 * the road sign is on I-17

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 29 April 2007

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Creative Commons Attribution 3.0 United States License.