Practice question

What is the significance of the '85th percentile speed' in road safety and speed management?

It is the speed below which 85% of vehicles travel under free-flow conditions and is commonly used to set speed limits
It is the maximum speed that 85% of road segments are designed to accommodate
It is the speed that causes 85% of crashes
It is the legal speed limit on 85% of roads

Answer: A — It is the speed below which 85% of vehicles travel under free-flow conditions and is commonly used to set speed limits

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