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Freight-ton miles per heavy-duty diesel truck
Average model weight of light-duty gas vehicles and trucks
By Natalie Zaczek
-Vehicles and trucks weighed the same in 1975
-Rapid decline in weight from 1975-1980
-Weights constant from 1980-1990s
-Weight increase from the 1990s to current
Technology goes to increase weight and acceleration, not fuel economy
Weight increased 21%
Horsepower increased 79%
If the 2000 model year light vehicle had the same performance and weight as the 1981 model year, there would have been a 25% higher fuel efficiency.