Dirty DC

Roger Knowles submits this mathematically significant roadsign from the Washington DC. This sign handily beats the previously "dirtiest roadsign", Outlet Center. The other thing you will note about this sign is that it is hidden in trees and barely visible from the street.



The math here is a basic explanation fo the identity proof.

$$50 \times 1 = 50$$

This sign is at the intersection of US-1 and US-50 in