E-W splits.
11, 19, 25, 31, 45, 49.
N-S splits.
70 (which is unusual in that it didn't split into two branches, but it kept the main number along with the N and S branches. Also, the N and S split routes begin and end at different places.
There are business and/or bypass routes in Kentucky for a number of US routes. Some routes have multiple of them. The only alternates we have in Kentucky are 41 (two of them) and 60.
Back in the 60s and 70s, North Carolina used to split US routes into Business and By-Pass banners. There was no straight non-bannered route with one bannered route. Kentucky doesn't split into Business and By-Pass (although some locations may be signed that way.) You either have the "plain" route and a Business designation (designated nnX in official logs), or the "plain" route and a By-Pass designation (designated nnB).