Mineta Airport

Roger Knowles brings us this mathematically significant roadsign on the way to the San Jose International Airport.



Mr. Knowles again goes for the Kung Fu grip and tries for a higher score by throwing a square root in the mix. However, this time it doesn't get him any benefit, the sign scores the same either way.

$$3-1=\sqrt{4}$$

This sign is found in California on I-880 southbound just past the highway 101.