### BARS::Phi Exit 147 on Eastbound I-10 in Phoenix, Arizona

These road signs were found on eastbound I-10 in Phoenix, Arizona.

```+----------------------------+ +---------+ +-----------+ +-----------+
| Exit Left             147C | | 10 East | | Exit 147B | | Exit 147A |
| HOV 202  East  HOV 10 East | |  Tucson | | 51  North | | 202  East |
|                 6am - 9am  | +---------+ | 1/4  Mile | | 1/4  Mile |
|                 3pm - 7pm  |             +-----------+ | Exit Only |
+----------------------------+                           +-----------+

the numbers are:
147  202  10  6  9  3  7  10  51  1/4  147  147  202  1/4

the math is:
n = (1/4) * (51 - (147 - (((202 + 202) * (1/4)) - (147 / 147))))
d = sqrt(log(10) + log(10) + 6 - 3))
(n + d) / (9 - 7) = Phi

...or...

(((1/4) * (51 - (147 - (((202 + 202) * (1/4)) - (147 / 147)))))
+ sqrt(log(10) + log(10) + 6 - 3)) / (9 - 7) = Phi

observe...
Phi = 1.61803399   or   (1 + sqrt(5)) / 2
log(10) = 1
```

Creator: Gerald D. Thurman [gthurman@gmail.com]
Created: 24 March 2007