Something people have to know is that these rules affect only the center of Madrid and traffic has been severely restricted in the Gran Via. Traditionally, this

Something people have to know is that these rules affect only the center of Madrid and traffic has been severely restricted in the Gran Via. Traditionally, this has been an important route to get from one side of the city to the other. So what this means is this traffic has moved somewhere else and that's why you see such a small drop in CO2 emissions in the city as a whole. Ironically, few families live in the center, so this might end up worsening the problem in residential/family areas. Now closing the Gran Via and surrounding roads is problematic for various reasons. For example, the most important museums and cultural activities are in this area.