Those reports are fairly basic but interesting. Also those images are google streetview so not necessarily as bad/good as at time of crash, not fully suitable for keyboard detectives.
I looked up a fatal truck crash of recent times and it said (among other causes) that the truck had a defective brake. This is quite common as if even one hub is out of adjustment when they check it afterwards it means the brakes are as a whole, techinically defective even if no real world drop in performance.
You would have trouble with arguing the road caused your crash unless it was a sudden failure of the tarmac like what happens around Wairakei with pumice base that causes pothole outbreaks in heavy rain. And by outbreaks I mean dozens over several hours. So you'd have to have something like that and multiple crashes, other wise if no one else is crashing how can you blame the road? (from a legal argument angle). Tar bleed is well known and a prudent driver/rider is expected to be aware of the risk, perhaps transit/ltsa could swallow their pride and put it in the roadcode as something to look out for.
BTW on of the trucking advocacy groups served an OSH notice on transit to fix certain bits of road that were causing trucks traction/safety issues. Within 24hrs by law they were required to act on the problem. In the short term this meant warning signs but eventually flowed on to the govt having to budget to fix road X as they are now all liable in chain of responsibility about a problem.
Every great cause begins as a movement, becomes a business, and eventually degenerates into a racket - Eric Hoffer
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