Speed has positive impacts on economy. But excessive speeds (I.e. driving above the speed limits) or inappropriate speeds (driving too fast for the prevailing conditions, but within the limits) are dangerous everywhere. Speed also has negative impacts on the environment and quality of life. Hence the interest to launch sound speed management policies. The paper highlights some results of the OECD-ECMT group dealing with this subject. The results presented here will be those more suited for urban areas. Of course, the technological aspects will be more developed than the others.
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