Stay back stickers are merely sensible advice. They are there because some idiots on bikes do pull stupid stunts such as attempting to squeeze themselves through the space a truck driver needs to make a turn. Some are even so unaware of their stupidity that they post videos of themselves getting knocked off after racing through the blind spot to the left of a truck heading twoards a narrowing lane and expect our sympathy when the inevitable happens.
I'm sure all the 2-wheels-good-4-wheels-bad brigade who moan about these stickers would be the first to condemn any motorist that overtook them while they were stopped waiting to turn right or tried to squeeze past leaving an inadequate space or if they had pulled out to make a tight left hand turn only to find a stream of motorcycles flying past on the left - yet will take the side of cyclists who attempt the very same manouevres. Really they are just the mirror image of petrolheads who dismiss all cyclists as scofflaw lycra louts.
Now at this point I'm sure the tribalists will accuse me of treachery to their cause. In their simplistic black-and-white world view all cyclists are perfectly behaved angels and all motorists evil physochpaths trying to kill us, thus every single collision involving a cycle and motor vehicle must therefore be the fault of the driver. The only other PoV in this world view is to take the motorists side in every single case.
Just to make sure this is absolutely clear to such people, I need to state the following unambigously:
1. I do think it is the case that cyclists in general tend to be more careful and that drivers are very much more likely to be at fault in any collision.
2. I do believe that drivers have a much greater duty of care due to their greater capacity to do harm.
3. For these reasons I do support changing the law for presumed liability.
4. I do belive that the design of trucks needs to change to give drivers much better direct vision of their imedieate surroundings.
5. I do think that technology - cyclist detection systems - side guards should be regulated for.
However, this does not mean that there is nothing we can do to help ourselves - and educating cyclists to avoid putting themselves in dangerous positions is a good thing. If you are serious about safety (rather than simply playing a blame game) you have to start with the fact that we as a species are equipped with forwards pointing eyes and will be very much more aware of what is going on in front of us than what is coming from behind - this is just as true for us on bikes as it is for those in cars or in trucks - however many mirrors they may be equipped with.
Thanks. You have put it across very well.
I am also mindful that as we talk about these issues in a very focused way, the neglect from the authorities over the last 3 years has been short of appalling. The least they can do is learn from their continental neighbours in many respects.
In the meantime, educating our cyclist to be more spatially away of the dangers is an important plank. One example is that some cyclists not being aware that taking primary is an exercise in risk reduction. Being in front and not on the side of a tight situation is another.