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85th percentile important to setting speed limits

March 10, 2012
By DAVE WERNER (dwerner151@verizon.net) , Franklin County Traffic Safety Board

If you are a frequent reader of these articles on traffic law and traffic safety, you have seen numerous references to the "85th percentile speed." The consensus of traffic engineers throughout the country indicates that the appropriate value for a speed limit will almost always be that indicated by the 85th percentile speed (to the nearest 5 mph).

 
 
 

 

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