Multiple redundant diversion signs

One Network indicates that there are currently no diversions, or upcoming diversions, from the A1 northbound at Wansford through to the A1 Tinwell exit. Yet there are still numerous diversion signs left along this route. There are also two massive metal A-frames, with no signs attached, left on Tinwell Road Bridge just before the A1 junction. There is then another large sign on the corner of the A1 junction belonging to MW Martins TM, so presumably the two empty frames belong to them as well. I genuinely struggle to understand why your workers persistently leave redundant roadworks equipment scattered throughout the road network. They seem completely incapable of tidying up properly once works have been completed. Surely removing unnecessary signs, frames and other equipment should be a basic part of completing the job. It gives the impression that nobody is actually checking the area once the works have finished, leaving unnecessary equipment in place indefinitely.