Basically the title. I’m curious what they do to decide. surely they don’t just stick a random number on a sign and call it a day.
In: 16
Many jurisdictions do surveys of the speeds actual traffic travels on a road before speed limit signs are placed, and set the limit at some legally defined point in the speed distribution.
The one I specifically remember was for a SF Bay Area city. Limits were set so that 85% of the traffic was measured to be below that speed, rounded to 5 mph. I knew this because locals had complained that the posted limits were too low, and the town was legally required to re-survey the traffic.
In the US, as with so many things, there is often a mix of city, county, state, and national laws that must be complied with.
Latest Answers