[mmillin]

Do you have a source for how little maintenance this will need? I imagine there will be teams of people continually employed for regular maintenance and operations. Concrete does develop “bugs” in the form of cracks, chips, or other damage that needs to be repaired.

While software engineering certainly deals with different constraints, I don’t think this is a fair comparison. When stakes are low (as they are for most software engineering), different precautions are appropriate. The aerospace or financial software engineering worlds might be more comparable here, and the engineering for those systems looks quite different as a result.

See also: https://www.jerf.org/iri/post/2026/programming_is_engineerin...

[mschuster91]

> Do you have a source for how little maintenance this will need?

In Germany, twice a year inspection is mandatory for infrastructure [1] but this is only a visual inspection. Once every 6 years you got a large inspection [2] that includes a full go over everything including functionality checks plus a review of documentation (if it is still up to code) and of accident documentation, as well as a "knock test" on every m² of surface [3]. Fire safety systems are checked every quarter [4].

And out of these reports then you get action items. Depending on the severity of findings, it can be anything from "someone needs to do this until the next major inspection" to "holy cow stop ALL traffic NOW".

[1] https://www.stbapa.bayern.de/service/medien/meldungen/2023/2...

[2] https://www.fba.bund.de/DE/Meldungen/20230201_Tunneluntersuc...

[3] https://www.merkur.de/lokales/muenchen/baustellen-besuch-sta...

[4] https://www.autobahn.de/aktuelles/aktuell/tunnelwartung-im-b...

[peterfirefly]

Sometimes the inspections aren't worth much -- or aren't acted on -- and you end up with a bridge collapse, even in Germany:

https://en.wikipedia.org/wiki/Carola_Bridge

[mschuster91]

The problem is, it was known that the bridge was structurally unsound thanks to its age, but the elements that corroded and actually caused the damage could not be inspected at all. The report [1] is quite fascinating, the meat is on page 53/54:

> Auf Grundlage der gewonnenen Erkenntnisse und der positiven Berechnungsergebnisse wurde in der Gesamtbetrachtung weder ein akuter Handlungsbedarf festgestellt noch eine Verstärkung als erforderlich erachtet

> (Based on observation results and positive simulations no need to act was derived, nor was an increase in observation deemed to be necessary)

The root cause is deemed to be errors made all the way back during construction, most probably too long exposure of the steel cables to the environment (see page 108).

Only thanks to this desaster the actual failure mode and how to spot it got known in the first place. The report suggests (page 110) that bridges of a similar construction type (and thus, the same weakness) be retrofitted with acoustic monitoring to detect snapping cables.

[1] https://www.dresden.de/media/pdf/Strassenbau/Gutachten-Carol...

[Towaway69]

Definitely I am making a broad assumption with many specifies where one can say "but what about X,Y,Z". Certainly, there are buildings that fall down and bridges collapse but what is the trend? Is software engineering getting better or worse?

From the linked article:

> And I would say that the success of AI coding agents has proved once and for all that we had successfully built an engineering discipline so strong that we are also the first discipline that has been able to successfully run AI at large scale within our discipline.

Yet we have no real clue how AI works or how to debug it, it's a brute force solution to everyday problems. Daily there are new examples of AI "escaping" its enforced cage. Why? Why doesn't AI "just work"? Because we don't truly understand AI.

I think AI is exactly the opposite to "true" engineering where one understands the system and can reproduce it. After all, retraining the AI will probably give you a completely different AI even if the training data was the same.

[throw1234567891]

> Certainly, there are buildings that fall down and bridges collapse but what is the trend?

The trend is that they don’t because there’s a continuous maintenance happening on all of those. There’s an army of people doing checks and repairs all the time. Even then, it happens, like in Genoa.