This road sign is at Hualapai Mountain Park in Arizona. This sign was visited the day after Pi Day 2017.

The road sign says...

+----------+ | 4 X 4 | | Vehicles | | Only | +----------+the numbers are: 4 4 the math is: 4 = 4 rsStateEval: 4! + 4! = 48 rsStateEval: 4! * sqrt(4) = 48 * Arizona was the 48th state admitted to the Union. rsCardinalityEval: 4 / sqrt(4) = 2 rsCardinalityEval: sqrt(sqrt(4 * 4)) = 2 * There are two numbers in this sign. BARSfunc math: spf(4) = 4 * spf(n) = the sum of the prime factors of n domain: n must be a composite number * spf(4) = 2+2 = 4

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

**Created:** 18 March 2017

This work is licensed under a Creative Commons Attribution 3.0 United States License.