I'm going to pick a random suburb that happens to be near me. They are about a 33% even split of old suburbs (1940-1960s), middle suburbs (1970s-1990s) and new suburbs (2000s+), with maybe 15% of that new suburb land still totally empty. There are a few duplexes and apartment buildings in there, but nothing dense. No buildings higher than 3 stories, it's like 95% low density stuff.
Their budget for 2017 includes $7,143,000 towards "Major Streets and Local Streets". That's costs for basically every road except the freeways (those are maintained by the state). This suburbs spends that, every year, on roads alone.
"OH MY GOD THATS SO EXPENSIVE" says StrongTowns, "OBVIOUSLY SUBURBS ARE DOOMED!"
There are 75,000 people living in this suburb. That 7 million dollars, divided per person (per capita) per month, comes out to $8/month per person. (That's number is artificially high, because it includes none of the businesses or retail that also pay taxes -- it assumes just the residents alone shoulder all the burden).
Even ignoring all business revenue, for less than the cost of a Netflix subscription per person, this suburbs maintains every single street in the entire suburb.
An average house in this Midwestern Michigan suburb, costs about $150-200k. A single family home pays a couple hundred dollars per month in property taxes. It costs just $8 of those couple hundred dollars per month, to maintain every single street in the suburb.
Is it possible the municipality mis-counted something? Sure! Is it possible they aren't fully accounting for every possible road cost? Perhaps! Let's pretend they mis-counted by something extreme, let's assume they are a full 50% under-estimating on literally every street in the sububrb.
That doomsday scenario means a citizen might have to pay $16/month for roads, instead of $8. Oh no, what a terrible world that would be
I'm not pretending every suburb is identical. I'm sure there are suburbs that spend more than $8/per person per month on roads. Some suburbs are more sprawled out than others. But generally speaking, there is no great infrastructure apocalypse coming down upon us. It's just not happening, unless some major disaster wipes everything out all at once (like a hurricane, or a tornado, or a screwup like Flint's Water crisis).
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The Growth Ponzi scheme makes a great headline for StrongTowns. But for most people, it's completely fanfaction. It is not grounded in any reality whatsoever, for the vast majority of people who are reading it.