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Reply #27: 2 rules to go by; The 10% rule and the 75th percentile rule. [View All]

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A HERETIC I AM Donating Member (1000+ posts) Send PM | Profile | Ignore Tue Nov-01-11 10:13 PM
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27. 2 rules to go by; The 10% rule and the 75th percentile rule.
Edited on Tue Nov-01-11 10:24 PM by A HERETIC I AM
One has to do with safety, the other has to do with speeding directly.

The 10% rule suggests that one should never travel more than 10% over the posted speed limit. In other words, no more than 60.5 MPH in a 55 zone, no more than 38.5 in a 35 zone, etc. Of course, the higher the posted speed limit, the lower this percentage should be. Most cops will give you the ten percent, as long as it isn't egregious and it complies with......


The 75th percentile rule. This suggests that the safest speed to travel on a given roadway regardless of the posted speed limit is that speed which 75% of traffic is flowing. If the speed limit is 70 and 75% of the traffic is traveling at 85, then the safest speed is 85. It also is the case that if the posted speed limit is 70 and 75% of the traffic is doing 40, then the safest speed is 40. If you are traveling considerably faster or slower than the 75%, YOU are the hazard.

As far as your questions are concerned, yes, I am ABSOLUTELY aware of my speed at every moment. I am also aware of traffic around me. I check my mirrors regularly. It is a damned rare event for me anymore that I am surprised to find a vehicle next to me when I go to change lanes. I don't worry about cops because I follow the above two rules.

I take the driving task seriously. It's my job.

Edit: spelling
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