All of that said, there is always the problem of the unwritten "political" warrant. The mayor wants a stop sign (or signal or roundabout) here, so one is going in even if it is worse for the traffic. Of course, there are also fads to put in roundabouts (or what have you). Some of the roundabouts are going to be unwarranted or conditions will change. Roundabouts work best when applied correctly.
I mean you don't know how many computers you can log on to simply by walking up to the desk and opening the drawer which has a sticky note with the password on it..
My wife works as a doctor at 3 hospitals. Between the three, she has something like 17 passwords to access various computer systems. She also has to change them every 30 to 90 days and she may not even work at two of the hospitals for some months at a time. How is anyone without a photographic memory supposed to keep track of all of those logins? That's not to say my wife writes passwords on a post-it (she'd need her own desk for that), but it explains such behavior. Password policies that require frequent changes result in weak passwords (password1 this month, then password2, etc.)
Now I have to dig another shallow grave in the backyard. I just finished re-sodding too.
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