<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by pierre mclopez:
I checked out US 24 in the map and it's probably little changed in decades. It was numbered in 1924, can't find it's original name. I hope to drive it from Colorado to Indianapolis starting Sept 14.</font>
Hate to be a prude here, but the the preliminary numbering system for U.S. highways was first laid out in 1926, wand was made official as of January 2, 1927.