What is the 85th percentile speed?

The 85th percentile speed is the speed at or below which 85 percent of the motorists drive on a given road when unaffected by slower traffic or poor weather. This speed indicates the speed that most motorists on that road consider safe and reasonable under ideal conditions.

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1. Why are there paint marks in the road?
2. What are the little flags in my front yard?
3. Is the road going to be widened?
4. County water is running across my property - can I get it diverted somewhere else?
5. How can I get a signal constructed at an intersection?
6. Where can I find a list of roads closed due to weather, construction, or special events?
7. How are speed limits set?
8. What conditions influence speed limits?
9. What is a traffic engineering study?
10. What is the 85th percentile speed?