deadfall
Joined 14 years ago
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Jan 11
Joined 14 years ago
"The speed limit is commonly set at or below the 85th percentile operating speed (being the speed which no more than 15% of traffic is exceeding)[41][42][43] and in the US is typically set 8 to 12 mph (13 to 19 km/h) below that speed." http://en.wikipedia.org/wiki/Speed_limit