News about the Crit'Air, the environmental zones and air pollution
Reducing speed limits in larger cities and in their access points is a common measure in plans for air quality in different Spanish cities. However, reality is more complicated and other factors, such as fuel or vehicle type, determine the extent to which this measure is effective. According to several experts, reducing speed limits to under 30 km/h actually increases air pollution. These experts also agree that the key is reducing the number of vehicles that access the city.