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Analysis of the Vehicle Inventory and Use Survey for Trucks ... - About

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Mean VMT<br />

100,000<br />

90,000<br />

80,000<br />

70,000<br />

60,000<br />

50,000<br />

40,000<br />

30,000<br />

20,000<br />

10,000<br />

0<br />

Figure 8.2-1<br />

Comparison <strong>of</strong> Mean Annual VMT by <strong>Vehicle</strong> Group <strong>and</strong> by Year<br />

1997<br />

1992<br />

1987<br />

Truck +<br />

Trailer @ 5axle<br />

Truck +<br />

Trailer @ 6axles<br />

or<br />

more<br />

3-S2 Tridem Axle<br />

Semitrailer<br />

<strong>Vehicle</strong> Group<br />

4S1/S2 STAA Doubles @<br />

6 axles or<br />

more<br />

Triples

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