3 ms·
By definition, x percent of the people are below the xth percentile. That’s not a sane way to set limits
by pdpi 6y ago
By definition, x percent of the people are below the xth percentile. That’s not a sane way to set limits
- throwaway0a5e 6y agoThat sounds like a pretty sane way to set a limit that by definition should not be exceeded. It's also the way civil engineers recommend speed limits be set. I think the current number they use is 85th percentile.
- k1t 6y agoYes, California for example: > The 85th percentile speed is the single most influential indicator of what is safe and reasonable, and it is used to determine the speed limit by rounding to the nearest 5 mph increment, and posting the speed limit at that speed. If there are sufficient conditions not readily apparent to the driver, as determined by a registered engineer, the posted speed limit can be lowered by 5 mph, and such a decision must be clearly documented in the E&TS. https://dot.ca.gov/programs/safety-programs/setting-speed-limits https://dot.ca.gov/programs/safety-programs/setting-speed-li...