you wrote 'cannot respond'.  But as anyone reading can see, I have frequently responded.  You just don't like my answers.  The topic I am discussing is modern roundabouts.  They are regularly constructed in cold climates across the US, Canada and Europe without significant issue related to weather.  They don't use signals, so criticisms of signal timing are irrelevant.  You criticize the road users, but ignore solutions like roundabouts in favor of the same old solutions (which you also criticize).  You have yet to articulate your vision of a properly designed road system that would keep all users safe, that anyone could also critique.  Be brave! Tell us your vision.