I'm torn on this. Clearly repeating the same action over and over again (the placement of the bollard) and expecting a different outcome is insane. That said, it is entirely possible to turn that corner without clipping it - you don't need constant visibility of the corner as you turn - vehicles have blind spots, yes, but humans also have spatial awareness. Personally, I don't think that lorries should be using these streets as a cut through (basically rat running) and the excuse that 'my satnav told me to do it' is lame. The answer would seem to be some sort of width restriction earlier on, maybe at the junction with Bellenden.