It is part of the "modernization" Ohio DOT is doing to I-75 in the Cincinnati area. The section between Harrison Ave and I-74 has been upgraded as well as the section just north of I-74 to the Norwood Lateral (additional lanes, improved sight lines, improved merges). The interchange with I-74 is going through a complete renovation with overpasses rebuilt and re-aligned.
The section mentioned above is in the area around GE--from Exit 13 to Exit 14. The eastern service road was flat through the area unlike the western service road which undulated along the land. There was also three mainline lanes through here, which is being increased to four.
This is supposed to coincide with improving the area of the Lockland split. A little history for those not familiar...
The current southbound lanes in the "canyon" were the original divided four lanes of I-75. In the early 1960's it was determined that new northbound lanes were needed as this local freeway was part of a now national freeway, so new northbound lanes were built starting south of Galbraith Road and curved 1/2 mile east of the southbound lanes, merging just south of Exit 13.
There is also much clearing out of the area around the Lockland split. I am not sure as to what will be constructed in the end.
As far as traffic, 3 lanes are being maintained each way with the usual slowdowns in the morning and evening. Maybe it will be partly ready by next fall, however, I am expecting more of a 2021 completion date.