How does something so endemic like this get fixed?

That's a very good question. Ultimately, the standards of practice in traffic engineering need to change. Speaking of which: to put a finer point on just how much of an uphill battle that is, consider the fact that even the name itself^1^ -- "traffic engineering" -- is biased towards narrow concern for the routing of cars at the expense of holistic consideration of the street as a place. (See also: confessions #2, #20, and #28) There's a huge amount of institutional inertia supporting the bad status quo, including everything from university curriculum, to standards documents like the AASHTO Green Book and the MUTCD, to the fact that young Engineers-In-Training (EITs) are required to work under existing licensed Professional Engineers (PEs) for about half a decade (it varies depending on circumstances) before being allowed by law to strike out on their own -- which on balance is almost certainly a good thing because we definitely don't want unqualified people stamping plans, but also could lead to being inculcated into old ways of thinking and having latent new urbanist inclinations beaten out of them.

Fun fact: the biggest US traffic engineering research group, one which has an outsize influence in writing those standards documents, is none other than the Texas A&M Transportation Institute (TTI). In Texas. Not that there's anything wrong with that, but yea.

Anyway, one way for non-engineers to try to help that happen faster -- other than bitching about it on social media like I'm doing right now -- would be to educate yourself on New Urbanist/Strong Towns/Fuck Cars/etc. ideas, then get involved with your local politics and lobby for said ideas to be implemented. More concretely, read Jane Jacobs and Shoup and watch a bunch of Not Just Bikes videos, then call up your city councilperson, county commissioner and state rep, join whatever citizen planning groups happen to be around (e.g. my city has "NPUs"), and start bitching at those people about it. You can also go to public hearings for road projects and bitch at the engineers directly (they love that sort of thing, LOL).

^1^ It's a totally different subject -- albeit one I'm also passionate about -- but I like to cite this article as a good demonstration of how framing matters. It really can't just be dismissed as "mere semantics."

Seriously. Cops sitting to ticket people are essentially just applying an extra tax to fund their departments. Not giving that to them is a good thing.

I've more often seen unsafe driving conditions because of people slowing down to avoid a radar cop than when traffic is flowing predictably and consistently.

I really don't understand how this shit is even legal.

"Tell me where I can and can't break laws that were literally put in place so I don't accidentally fucking kill someone".

It's literally built to help people avoid the punishment made to keep people from doing something that's literally dangerous to the people around them.

Seriously - the most dangerous roads I've ever been on were in Texas where there were 12 lane highways, and crazy people who wanted to drive 100MPH past you in the right-hand lane, all while people are merging on and off the highway.

Doing the speed limit meant that EVERYONE was driving faster than you, which meant that you were a lot more likely to get rear-ended from someone who didn't see you in time. You have to speed to stay safe, and then you add in construction zones and it's just a death trap.

Where is our public transportation option?