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Why do I see 60/50mph speed limits set when there are low levels of traffic and the traffic appears to be moving freely?

April 26, 2017appears levels limits low moving speed Traffic

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Why do I see 60/50mph speed limits set when there are low levels of traffic and the traffic appears to be moving freely?

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This often happens after a period of congestion on the motorway and the traffic conditions are recovering. By limiting the speed of traffic as conditions improve, we decrease the likelihood that the traffic flow will break down in stop-start conditions again. In addition, the system is designed in such a way that it prevents the signs displaying the speed limits being automatically changed or turned on and off too quickly. This ensures that drivers have enough time to respond to the information that is being displayed, and are not confused by quickly-changing messages.