Speed plateaus are great for limiting speed. There’s a residential neighborhood in my area, two lane, 1ea either direction, that has a few of them with the gentle slopes up to a flat topped plateau and down again, not just larger speed bumps, but plateaued. You can even put cross walks on these. The speed limit in that area is 25mph in that section.

That isn’t a fix all for every* situation, but there are other options, especially other than using automated surveillance systems that are regularly questioned for being excessive, biased, fallible, and for being used by jurisdictions as free and unchecked revenue sources.

Especially when infrastructure engineering doesn’t become a revenue source that the jurisdiction then relies on, which leads them to build more, while also funneling tax payer money into third party venders who are also capable of either reviewing the data collected or viewing that data themselves. Some of these outsource to third parties to manage the traffic enforcement process, instead of having law enforcement certified and city/jurisdiction employed peace officers from being the only ones who can view or review the data.