While many jurisdictions do use Highway 13 as a valid number, in the province of Ontario, Canada, the number has never been issued and is skipped [REF].
Likewise, a U.S. Route 666 in the United States Numbered Routes system, known as the Devil's Highway, was renumbered to U.S. Route 491 in 2003 (however, this happened only after its parent, the famous U.S. Route 66, was decommissioned in 1985).