You mean highways that go to where they want to go?
"could instead be spending it in a more efficient manner: in an urban environment"
Well, we could be spending it all on barracks where we all sleep in bunks and eat in military-style chow halls. That would be even more efficient, right?
"Efficiency" is not the primary purpose of human life. It's probably not even in the top ten.
The suburban lifestyle needs to be subsidized in order to be sustainable, but good luck getting people to keep up with proper infrastructure investment. Even cities are failing at it (https://www.nytimes.com/2017/11/18/nyregion/new-york-subway-...), but suburbs have even more infrastructure to maintain with a much smaller tax base.
That guy is a good speaker if you ever get the chance.
All infrastructure is subsidized, including the lifestyle so beloved by young urban hipsters with no children. So?
Lafayette, Louisiana is in trouble because it had an oil boom followed by an oil bust.
And the idea of dividing up regions of the city by whether they "make a profit" or not is, to be blunt, just goofy. Yeah, revenue is generated in the industrial and business regions of town rather than in the residential regions. That's...unsurprising.
To expand a bit, imagine a block that has a branch of Bank of America, five apartment buildings, a small park, and a clinic operated by a non-profit.
Using the exact technique shown in your article (but on a smaller scale), the BofA branch would have a huge green spike, while all of the others would be red.
By the "reasoning" in the article, everyone except BofA should have their taxes raised.
Umm... no.
https://www.strongtowns.org/journal/2017/11/20/mapping-the-e...
You'd see exactly the same pattern if you divided the "dense urban core" up into smaller regions made up of businesses and apartment buildings. The business buildings would make money, and the apartment buildings would not.
And?