If I recall what I just saw driving through there correctly, what we have as a segment of US 178 on Liberty Highway beioween US 76 and Pearman Dairy Road is signed as Truck US 178. Mainline US 178 (North at least) stays with US 76 until it turns right at Pearman Dairy. I admit I wasn't looking for problems and only noticed this now as I'm adding the segments to my list file, now many miles down the road so I might not be perfectly accurate in my recollection of what's signed.