Everyone is being too complicated.
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I discovered the secret while navigating a Model X in streets in Bergamo, Italy that were only a few Centimeters wider than the car. If you look closely at the screen you'll see the sensors begin to show your clearance on each side with red 'slashes' on each side. Soon they will have constant sounds warning of close margins. Then the screen will begin to show the measured clearances, I saw them in CM but I'm sure they work in Imperial measure also. Those magic indications allowed me to navigate streets only 15 cm wider than the car without a mark. They also allowed me to park in an ancient parking garage that was about the width and length of the car, a trifle wider once I passed the critical entrance so I could exit normally.
That always works, but does require attentiveness and a certain sense of desperation...
I posted photos of some of that elsewhere. As daily matter those aids should easily suffice, especially once you become adjusted to them.