John I read this,
http://www.cyclecraft.co.uk/digest/research.html
Some of the information there is presented in a misleading way...it's statistics, it is going to be presented in a way as to justify the authors point of view. The really issue is that none of it matters, even if we all accept that cycle paths are statistically more dangerous, we have to be aware that is not the view of the general population and never will be. It is about getting bums on seats and cycle infrastructure is what puts them there.
As to your junction question, perhaps it is worth noting that in Holland cyclists have right of way at all those type of junctions. I do not use dangerous cycle paths and ones that do not give cyclists right of way, but require a death defying ability to look in all directions at once, are dangerous. But again you are missing the point, just because some paths are crap does not mean they are all crap, and even the crap ones are increasing modal share and over all safety. Ultimately it is always going to be about less cars, more bikes and the Dutch/Danish have the solution.
You clearly want to remain in you lycra clad ivory tower, which would be fine if you weren't also part of the problem. As MCA has said it is about man/woman in car looking at cyclist and saying to him/herself "That could be me, it looks safe and easy." Well as long as they see boys in lycra racing past on strange looking bikes they will remain in their cars safe in the knowledge that cycling is just for a bunch of weirdos and hippies.
We must fight hard for a better future, it is costly, but so important for quality of life and as MCA points out, we will save billions in the long run. Origamist thanks for your great post, it highlights how much has to be done. The lycra boys need to shut up or join the party because the future is NORMAL.