- ... that New York State Route 146B was decommissioned after as little as 17 years after its initial designation?
- ... that Michigan highway M-97 was simultaneously named both Reid Highway and Groesbeck Highway by different levels of government from 1927 until 1949, the year it was dedicated to Alex Groesbeck?
- ...that New Mexico State Road 6563 takes its number from the wavelength (6563 Å) used by scientists to locate areas of interest on the Sun?
- ...that Pennsylvania Route 645 was designated in 1962 in order to provide a route number at the Frystown interchange of I-78/US 22?
- ...that the original plans for Interstate 359 in Tuscaloosa, Alabama called for no interchanges between the termini at I-59 and 15th Street?
