Environmental Engineering Reference
In-Depth Information
30
Cars
Both
25
Light trucks
20
15
10
(a)
5
1975
1985
1995
2005
Model Year
fig. 11.3a
US miles per gallon. Fuel economy of US cars and light
trucks,
-
.(Sources: US Environmental Protection Agency,
National Highway Traf
c Safety Administration)
4 500
15
0 to 60 seconds
4 000
13
11
3 500
Weight
(b)
3 00
1975
9
1985
1995
2005
Model Year
Vehicle weight and acceleration. Vehicle weight initially
decreased to help meet the new standards, but has increased ever since.
(Source: US Environmental Protection Agency,
fig. 11.3b
)
