Environmental Engineering Reference
In-Depth Information
Table 2
Composition of circulating vehicle leet and percentage distribution of the
vehicle mileage in Naples municipality for year 2006
Category
Vehicles
Vehicles (%)
Vehic*km (%)
Gasoline passenger
cars
371,019
51.1
38.3
Diesel passenger cars
116,021
16.0
20.7
GPL passenger cars
18,298
2.5
4.2
Light duty vehicles
27,036
3.7
5.8
Heavy duty vehicles
5,753
0.7
1.4
Buses
845
0.1
1.3
Mopeds
90,000
12.4
14.1
Motorcycles
97,774
13.5
14.2
Total
726,746
100
100
Table 3
Percentage distribution of the gasoline and diesel passenger cars according to the
EU Directives with their mileage in Naples municipality for year 2006
GPC Veic*km
(%)
EU Directives
GPC (%)
DPC (%)
DPC Veic*km (%)
Euro 0
34.9
20.4
20.4
11.8
Euro 1
16.5
16.8
6.7
6.8
Euro 2
29.7
33.0
18.9
17.9
Euro 3
12
19.0
36.8
43.0
Euro 4
6.8
10.8
17.3
20.5
GPC = gasoline passenger cars; DPC = diesel passenger cars.
the fuel sold in Naples province has been unbundled at municipality level using the
number of vehicles registered in Naples municipality and province as spatial
proxy.
The most widespread vehicle category is represented by gasoline and Diesel
passenger car. These vehicles are then distinguished (Table
3
) according to the EU
Directives to which they conform. It has been found that in relation to the distribu-
tion of the total mileage for the gasoline passenger cars a high percentage is still
represented by EURO 0 vehicles. Indeed in the Naples municipality, as in many
other areas of southern Italy, the renewal of vehicle fleet is extremely slow com-
pared to other Italian regions, with obvious repercussions on air quality.
Instead in relation to diesel passenger cars, much more favorable results have
been observed. This vehicle category is on average younger than the gasoline pas-
senger cars and the largest percentage, around 43%, is represented by EURO 3 cars.
In order to determine the estimated total emissions in the municipality of Naples in
2006, also journeys of residents in other municipalities, commuting daily to Naples
for work or study, has been considered. The census ISTAT 2001 provides the num-
ber of these trips and the means of transport used for each town surrounding Naples
(Fig.
1
).
Total emissions from road traffic in Naples municipality for 2006 are summa-
rized in Table
4
. It is important to stress that the reported COV emissions include
