The points that Botach makes regarding the tanker incident, part of which Big Tone unfortunately agreed with, is so wrong that it should not go unchallenged.
First, SPEED:
Botach claims that the rider didn't slow down for the roundabout and asks "WHAT DISTANCE HE COULD EXPECT TO STOP IN". That was based on a look at the video and reliance on "perception", which is quite absurd when watching a video on YouTube. It is my perception that the cyclist clearly did slow down, but I can no more support that simply from perception than Botach can support his claims. So, let's apply a little science to the issue.
First, the answer to the shouted (capitals) question is: he could expect to stop in a distance that would allow him to escape being squashed by an idiot tanker driver who ignores the rules of the road. The proof of that is that he did indeed stop in time. If he had assumed the tanker would stop, he would be dead now, so clearly he didn't assume that.
Regarding his speed itself, I would estimate that the distance from the line at the entrance to the roundabout to the point at which he stopped is about 6m. On a dry road, the minimum stopping distance, excluding reaction time, for a bicycle at 10mph is 6m [refs 1 and 2]. However, let's use 11m instead, which puts the speed at between 13mph and 15mph [ibid]. That is not an excessive speed to enter the roundabout, particularly when you consider he has probably slowed from about 25 to 30 mph on the approach road.
So, your argument about speed just doesn't stand up.
Second, OBSERVATION:
Again, you are making wild assumptions based on your flawed perceptions from the video clip. The fact is that, when you see the camera rotate by a certain number of degrees, the eyes of the cyclist will be rotating by two or three times that amount. As you pointed out, the camera rotates to the side a few times on the approach road; those times are when the cyclist is actually looking backwards over his shoulder to maintain awareness of what (if anything) is behind.
On the approach to the roundabout, he does indeed scan to the left for hazards. In fact, as he crosses the threshold of the roundabout, you can actually see the tanker approaching on the left of the frame. At that point, his eyes will be scanning even further down that approach road, seeing the tanker and anything else that might be there.
So your argument about observation has no basis.
As he enters the roundabout, his speed appears to decrease dramatically, probably because he thinks there is a possibility that the tanker might not stop. But that is only my perception from the video, so I won't use that in my argument.
Third, ROAD POSITION:
An experienced cyclist travelling along that open approach road will be moving at something like 25 to 30 mph. At that kind of speed, it would be quite inappropriate to be riding down the cycle lane. That would give him no room to maneouvre if it becomes necessary, and would encourage any idiot drivers to pass him too close, at excessive speed [Ref 3 and 4]. He is a road vehicle and, particularly at that speed, needs to behave and be treated like one.
The same principle applies to his positioning on the roundabout. There is absolutely no doubt that the most dangerous place for a cyclist to be on a roundabout is near the edge, where he is less likely to be seen. His use of the full width of the carriageway is also correct as the avoidance of any sharp turns reduces the risk of his skidding on any surface oil that might be there. This is a single lane roundabout, so nobody has any business to be trying to pass him, and in any case there is nobody behind or to the right.
So, your argument about road position, whilst a matter of opinion, is unconvincing to say the least.
The cyclist did everything right and thankfully, as a result, is still here to tell the tale.
[Ref 1] "Cyclecraft", John Franklin, p52, 2007, The stationery Office.
[Ref 2] "Guide for the Development of Bicycle Facilities", American Association of State Highway and Transportation Officials, 1999. (
http://www.sccrtc.org/bikes/AASHTO_1999_BikeBook.pdf) (See formula on page 41)
[Ref 3]
http://www.youtube.com/watch?v=g3N6mJsLUDE[Ref 4]
http://www.youtube.com/watch?v=VIuYqQNLlDY