glueman wrote:Looking at the video three more times the rear observation point is a side issue to the incident - as I said in my original response I was making a general point about lack of 360 degree awareness. Helmet cams may not tell the whole story, as I don't use one I couldn't say. Based purely on those pov shots there was insufficient observation. If the cyclist had an increased field of view okay, but you have to wonder how much evidence could be gleaned after the event by a 50mm shot.
It's not a question of 'if', biologically your eyes give you a vastly wider field of view than is represented by all but the heaviest and most expensive SLR lenses. I know because I own both... but my head's only strong enough to hold up one of them
The camera shows us that the cyclist looks left as he negotiates the roundabout, although it doesn't show us what he sees - the other explanation is that he has bizarrely trained himself to turn his head that way while looking straight on, in order to simulate observation skills while deliberately not observing. To me this is a far-fetched alternative.
What I think *is* a valid point, although I don't agree with the ultimate conclusion, is that the incident could have been averted if the cyclist simply slowed at every give way line to protect himself against the risk that at each one in turn, a vehicle will speed onto the road rather than stopping. There is no doubt that by reducing his speed from 15mph to 10mph, or 5mph, magnatom could have ensured that any vehicle barging the roundabout would miss him.
However, practically speaking to ride like this would probably result in a good number of rear-ends, as drivers following cyclists on roundabouts, looking themselves to the right, simply smack into the back of them when they unexpectedly brake at each exit. To say nothing of the fact that cycling slowly enough to ensure safety would be miserably slow!
Myself, having driven that roundabout many times, our car would definitely have gone under the truck. I'd probably slow to no more than 20mph to enter, but certainly not as slow as 10mph going round if it was clear - and that would put us in the dead zone. The truck is probably only doing 15mph and I think it might be extremely hard to decide whether to haul the anchors for every vehicle that had slowed that much, on the assumption it was going to plough on.