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post #7 of Old 03-06-2019, 10:59 PM
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Join Date: Jul 2018
Posts: 350
Originally Posted by Jasmine View Post

@Tripod the cause of speed-related accidents is speed variance. There are many situations where the flow of traffic is well in excess of the posted limits. The question here is, who's causing the variance -- the law-observing driver or the majority of speeders?

A friend had a solution: Take down all the speed limit signs, measure the speed of traffic, and post the average as the limit. Exceptions would only be where hazards might not be obvious.

Back in the 1970s when the speed limits dropped to the old "double-nickel" I heard a state official being interviewed on the radio. He said in the year since the speed limit had dropped to 55 there had not been a single fatality in that state where both vehicles were traveling at or below the speed limit and all occupants were wearing their seat belts. Lower speed limits save gas and save lives. Think how much less expensive cars would be without air bags! And how much technology could be eliminated if we all drove 55! STM, the biggest problems with our Compasses seem to be related to the manufacturer trying to cope with CAFE standards and safety.
And in Germany they achieve far less crashes without any upper speeds limits, compared to any other developed country. I think the main issue with US is not the speed limits but poor lane discipline. People travel at different speeds at different lanes, which causes large speed variance within the same lane. It is true that the main cause of accidents is speed variance and the reason for that is number of accidents is directly proportional to the number of times two cars traveling on the same lane pass next to each other (let that be a divided or multi-lane road). Traveling below speed limits makes this even worse because majority of the cars on the road will actual try to pass you, whereas if you traveled or slightly above speed limit, you would be moving with the traffic with less "passing" occurring. So, higher speed variance increase the times two cars pass each other and that increase the chance of a crash, but traveling slower makes it even worse because than you have higher speed variance to everybody.
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