It appears that NC 140 is being resigned to I-140 east of I-40. NC 140 is or soon will be unsigned.
Do you mean reassigned to 140 east of 40 or removed from the freeway altogether?
The NC-140 signage on the freeway east of I-40 is being replaced with I-140 signage, just like it was replaced from the westernmost segment (from US 17 to US 74/76) when the segment from US 74/76 was completed.
NC-140 has been the NCDOT designation for the entire freeway. However, it has only been signed on the westernmost and easternmost segments. The segments between were always signed as I-140.
I-140 has always been the FHWA designation for the entire freeway. The westernmost segment could have been signed as Future I-140 when it was a disconnected freeway, but NCDOT signed it as NC-140 until it was connected. The easternmost segment could have been signed as I-140, but NCDOT signed it as US 17/NC 140. Now, NCDOT is removing the US 17 and NC 140 signs and replacing them with I-140 signs.
In the HB, NC140 should be removed, as it is unsigned, and I-140 should be extended to US 17.