Funny, in my anecdotal evidence, my power, coax, and telephone lines are run through a 10 foot easement at the back of my yard, buried underground. It is like that for all houses on my street. I believe water sewer and natural gas come from the street side at the front, also buried underground. But because you never saw a setup like mine, that must mean it doesn't exist. I see.
It isn't intellectually dishonest to compare regulated utilities (electric, water, sewer) with "regulated" utilities (telecom) because the reasons I gave are correct. And yes, I do still see telecom companies as regulated, since when you have to allow an interconnect to other companies providing the same service, you are not free to do as you would please (unregulated). You do not want a disruption on your property, people digging holes to lay new lines, because someone down the street wants a different brand of Cable than what is in the area. Because of that reason, telecom companies were given a local monopoly. Laws might have been changed to allow for competitors, but even if they have, where are the competition?
In a perfect world, perhaps every underground run would have extra space. Frankly, if a city owned the conduits by through which the lines were run, awesome! That would allow for new contenders in an area without disruption, the exact goal I would seek. That is exactly the equivalent 'public infrastructure, private usage' I hinted at. However, I don't believe the cities generally own said conduit to provide that service. When the conduits are privately held and AT&T (for example) won't let a competitor run lines through their conduit, that kind of turns us back to the competitor having to run their own conduit and line, doesn't it?