July 1, 2009: Middlesex, Pennsylvania, near Carlisle. This is how I-83 connects to the Pennsylvania Turnpike.
Eleven is one of Iowa’s longest dormant numbers, and certainly the longest dormant two-digit. It was replaced by a fourth version of IA 150 in 1941. (Or arguably third. The second designation was made but likely superseded before signs went up.) Compare to WI 11, which runs across the southern length of the state and ends within a couple miles of Dubuque.