Mile 420 in Colorado still exists but the marker for it does not.
In an attempt to stave off sign swipers who repeatedly stole the marker for the 420th mile on Interstate 70, the state's Department of Transportation created a sign marking Mile 419.99.
CDOT spokeswoman Amy Ford told the Denver Post Friday that a photo of the unusual mile-marker sign floating around the Internet is real.
"Obviously people steal these signs," Ford said. "In the past, if a sign was stolen too much, we wouldn't replace it. This is sort of an innovative way for us to keep the sign there."
The number 420 has long been associated with marijuana, though its origins as shorthand for pot are murky.
Ford says it's the only 420 sign to be replaced in the state that recently legalized recreational marijuana.