The accompanying photographs depict a road sign in Prescott Arizona.
When I first saw this, and it registered in my mind what the sign actually said, I half expected to see shards of red glass along the roadway, along with bits of chrome and the other assorted detritus of scores of fender-benders as driver after driver got distracted, trying to decipher what they had seen.
Then reality set in, along with the cold realization that most of the drivers around me would notice nothing wrong.
I can attest to the fact that there is no shoulder on that road for the next 1500 ft, not 150 ft as the sign (inadvertently?) proclaims.
For more decimal point fallacies (mostly involving pricing confusion between integer cents and decimal parts of a dollar), see Mr Silva’s Math Website.
I can’t resist sharing another favorite from my photo album, even though it isn’t mathematical. It speaks to one of my pet peeves: errors in usage of quotation marks and apostrophes.
One hopes they went out of business because of bad grammar.