See here, for example. <a href="http://www.offsettingbehaviour.blogspot.co.nz/2013/01/embedded-fragility.html">http://www.offsettingbehaviour.blogspot.co.nz/2013/01/embedded-fragility.html</a> Scott As a planner who is called upon to regulate such things as parking and building height, I would suggest an alternative conclusion to the one you make.