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If it's a kerb, the reporting is entirely inaccurate. :) If the crash had involved a kerb, the article should have said that, as they're really very different things. The white line that's pictured and purported to be the corpus delicti does look as if it might cause such a fall (although inspecting it on-site will be more reliable).
Regardless, I can assure you that no traffic engineer will put a 10cm-high kerb into a carriageway and then paint it white. I mean, people crash into kerbs all the time, whether segregating or not, but here the description is of a painted white line, and those can often have a certain thickness, e.g. markings renewed from time to time often do.
I took that as a kerb to be honest. I can't see how you can "fix" a kerb... The easiest thing would be to add a transition to one side, but then is the council facilitating liability, it's a bit of a minefield. I think the idea is to stay in the lane until the signal. I wouldn't traverse that at speed unless primed with a bunny hop. The potholes up here are a lot more deadly and require regular hops. I hope he gets well soon.