It's 2021. There is no reason cars should be able to speed at all if every gimmick drone from Amazon can refuse to fly into protected airspace. Half of HN is expecting that by 2025 they will sell their car and permanently ride on some Waymo taxi; are they going to reach over the separator and push down on the gas pedal, if one exists anymore? No, nobody will give a fuck that the thing is doing 20mph in a 20mph zone. We can have that today even we can't have the autonomous driving part.

> Make the road narrow, add curves to it, and suddenly people will do lower speeds naturally because they don't feel like they have as much of a buffer.

I am not sure how that would be possible where I live. This would involve destroying a bunch of residential homes to add curves (the neighborhood I am in goes back at least to the 1930s, as thats when the house I am in was originally built).

"Traffic calming" features are retrofitted to roads all the time. Things like bringing the curb outward (often creating divided bike lanes in the process), speed bumps, and adding center islands to intersections.

How does narrowing roads lead to destroying houses? You can also add curves to road while narrowing it without changing the overall width of the road. If nothing else works just add speed bumps.

The roads where I live are quite narrow to begin with, and many houses do not have driveways, so street parking is the only choice for many houses. I don't think there is a possiblity of narrowing them in the first place.