Well, we are going a little out of order with today’s road trip. But, I am following the lead of Jim Grey, my co-admin of the Indiana Transportation History Facebook group, as today is a special day…number 52, as a matter of fact.
US 52 started, originally, at US 41 near Fowler, Indiana. This beginning of the route created an almost direct route from Cincinnati to Chicago, via Indianapolis. Through Indiana, it took the place of a couple of original state roads: the Lafayette Road (Lafayette to Indianapolis) and the Brookville Road (Indianapolis to Brookville). In the Auto Trail era, parts of the road were also part of the Jackson Highway (from Montmorenci to Lafayette and from Lebanon to Indianapolis). Those sections would become original SR 6 in 1919. By 1923, the section from Indianapolis to Brookville (and to the Ohio state line) became OSR 39.
The rest of what became US 52 was a “new route” (not part of the then state highway system) when the Great Renumbering happened on 1 October 1926.