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One of the issues is that posted speeds often don’t match the speed the road allows people to comfortably do. To bring speeds down, the things that are generall

One of the issues is that posted speeds often don’t match the speed the road allows people to comfortably do. To bring speeds down, the things that are generally most effective are street narrowing, speed tables and humps (to bring to speeds safe in neighborhoods), and then obstacles like protected bike lanes or pedestrian refuge islands. When a street is designed to allow someone to comfortably do 45 because it’s maybe 2 lanes in one direction instead of 1, but posted as a 25, people will speed on it.

TulliusCicero 2y ago
Also useful to do stuff like make roads curved and add trees to the side. A YouTube short I saw the other day about this concept: https://youtube.com/shorts/MyT7F5zuOU4 https://youtube.com/shorts/MyT7F5zuOU4
- dzhiurgis 2y ago
  > add trees to the side also great way to get someone killed if they meet one
  - xref 2y ago
    But a good way to save pedestrians on the sidewalk
    - dzhiurgis 2y ago
      Ok kinda makes for city. We had outcry when some country roads were cleared out of trees. Each of them had a life on them.
rainsford 2y ago
I'm sort of sympathetic to that argument, but my observation has also been that most drivers are terrible at judging safe speeds for a given road. They go way too slow when they don't need to (a gentle curve on a highway) and drive way too fast for conditions at other times (a narrow twisty two lane road with blocked sight lines and blind driveways).
sunflowerfly 2y ago
Also visual narrowing, such as adding trees and light curves. People drive what they feel the road should be and mostly ignore speed limits.
Eddy_Viscosity2 2y ago
Some towns deliberately post speed limits below what drivers would naturally go in order to set speed traps for revenue.