Lower/higher speed limits?
Concerning the pending legislation to increase Illinois speed limits and a compromise that may leave final decisions to the counties …
Studies have long shown speed limits have little effect on how fast people actually drive on open roads, and any traffic engineer (and many state police departments) will explain 85th percentile speeds are the proper way to set limits (the maximum speed at which 85 percent of traffic actually flows when unencumbered).
Artificially low limits do not slow down the faster traffic, but they do cause several types of dysfunction which make the roads more dangerous. For example, slower traffic will tend to flow at the posted limit. When limits are too low, speed variance between the fastest and slowest traffic increases. This is a leading cause of road rage particularly when slower traffic does not keep right and yield to faster traffic. Dumbed-down limits also tend to increase distracting activities, further contributing to impaired drivers and road rage as slower traffic lumbers along in the passing lane chit-chatting on the phone, too busy to notice someone wants to pass.
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