Summary
The aim of the project "Clean Cars, Please", carried out by the local authority in Naples (Provincia di Napoli) together with the Naples Agency for Energy and the Environment (ANEA), was that of photographing the actual level of efficiency, in environmental terms, of the vehicles circulating in the Naples area. An advertising campaign was also carried out to stress the importance of keeping one's car in a good condition in order to improve air quality and save fuel.
Within the framework of the "Clean Cars, Please" campaign over 2000 gas exhaust tests were carried out on the road; of these 1105 (55 %) present quantities of polluting gases over the legal limit, whereas the remaining 897 tests (45 %) detected emissions within the legal limit.
Results
From the comparison between the data related to the circulating cars in the local and national territories, we can declare that in province of Naples there are older cars and, then more polluting, in comparison with the rest of Italy. In fact provincial car fleet is constituted by the 76% of gasoline cars registered before the 1992 against the national data of the 53%.
ANEA has organised 2000 checks on road; of this 1105 (55%) present values greater then law limit, resulting then negative, and the remainders 897 verifications (45%) show values of the polluting issues within the law limits. Dividing the total number of cars in the basis of fuel type (gasoline, diesel and LPG) and calculating the percentage of the positive results for the three car categories, it is possible to observe that the more elevated percentage with negative result is the LPG fuelled cars (more of the 70 %), while the gasoline cars are the second ones with 54%; for the diesel cars, instead, the percentage of negative results is around the 49%. These data depend on the age of circulating cars and on the insufficient attention that the drivers turn to the maintenance of their vehicle.
In a lot of Italian cities many experiences have been carried out aimed at reducing the polluting issues from car traffic such as the obligation of the annual verification of the exhaust gas.
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Car Use
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Case Study (41 KB PDF)