For those that say that the roads are designed only for the posted speed limited, that is not the case. Speeds are adjusted all the time on highways, up and down depending on circumstances. It comes down to common sense and common courtesy. I think speed is relative to the other vehicles around you. If most of the vehciles are traveling over the speed limit, it is safer for traffic to travel close to the same rate of speed. You dont want some guy doing 30k under or 30k over what everyone else is doing. And it all depends on the road conditions.
Having said that, the faster you drive....the harder it is to stop. So the people that say those driving faster are more dangerous, this may be the case if they do not compinsate for the stopping distances.
Again...common sense and common courtesy would solve a lot of problems.
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