I have noticed certain signs with curve symbols and a lower speed limit posted directly below the sign. How is this speed limit established?

The speed limit posted under any warning sign is called an "advisory" speed limit. It informs motorists of the recommended safe speed for the design of the roadway. The appropriate speed is determined through the measurement of centrifugal forces (as exerted upon the driver) when driving through the curve at various speeds. Using this information, the recommended maximum speed can be determined and posted accordingly.

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1. How does a traffic signal work?
2. Who do I call if the signal isn't working properly?
3. How are speed limits determined (or changed)?
4. What is traffic calming?
5. What can be done about speeding in my neighborhood?
6. Does the City of Cedar Park have a traffic calming program?
7. How do the pedestrian signals (walk/don't walk) work?
8. How do I request a Stop Sign, traffic signal or Speed Limit Sign for an intersection?
9. Why doesn't the city of cedar park install "Children at Play" signs?
10. I have noticed certain signs with curve symbols and a lower speed limit posted directly below the sign. How is this speed limit established?
11. I see cameras at certain intersections. What do they do? Does the City of Cedar Park use photo-radar or other automatic enforcement techniques?
12. How can I get more information about traffic volumes and speeds on my street?
13. Who can I call if I cannot see at an intersection because of trees, plants, privacy fences, etc.?
14. What is a TIA (Traffic Impact Analysis) and why is one required? What type of developments require a TIA?
15. How does the City of Cedar Park determine where new roads go?