This felt worse in reality than it looks in the dashcam footage, and it certainly gave me a fright. When I realised what was happening and started to swerve away from it, the Ute driven by the man who _should_ have been putting out cones and warning road signs, was kind of in my way, so I mostly just drove through it.  The next day the debris was cleared, and it was properly signed and coned.  In all fairness, having driven past when the work was being done, I should have been more careful approaching it, but the sun was in my eyes, and the problem area was in deep shadow.  Oh well.