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

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7.0 <strong>Analysis</strong> <strong>of</strong> Weights, Dimensions, <strong>and</strong> Operating<br />

Characteristics <strong>for</strong> <strong>the</strong> 5-Axles or More Fleet<br />

7.1 <strong>Analysis</strong> Structure<br />

More than 93% <strong>of</strong> <strong>the</strong> 1997 5-axles or more fleet is accounted <strong>for</strong> by <strong>the</strong> combination <strong>of</strong> <strong>the</strong> 4<br />

specific truck configurations <strong>and</strong> <strong>the</strong> 13 specific body types listed below:<br />

FOUR SPECIFIC CONFIGURATIONS<br />

# <strong>the</strong> 3 + 2 truck + trailer (4.39%)<br />

# <strong>the</strong> 3-S2 tractor-semitrailer (75.11%)<br />

# <strong>the</strong> 3-S3 tractor-semitrailer (9.60%)<br />

# <strong>the</strong> 2-S1-2 STAA tractor + double trailer combination (3.95%).<br />

THIRTEEN SPECIFIC BODY TYPES<br />

# low boy<br />

# basic plat<strong>for</strong>m<br />

# livestock truck<br />

# insulated non-refrigerated van<br />

# insulated refrigerated van<br />

# drop frame van<br />

# basic enclosed van<br />

# pole <strong>and</strong> logging truck<br />

# automobile transporter<br />

# grain body<br />

# dump truck<br />

# tank truck <strong>for</strong> liquids or gases<br />

# tank truck <strong>for</strong> dry bulk.<br />

Various combinations <strong>of</strong> configuration <strong>and</strong> body type (e.g., <strong>the</strong> 3-S2 refrigerated van) were<br />

chosen <strong>for</strong> analysis based on <strong>the</strong>ir occurrence in <strong>the</strong> truck fleet. The most prevalent<br />

configuration/body types in <strong>the</strong> truck fleet were analyzed in terms <strong>of</strong> <strong>the</strong>ir national operational<br />

characteristics <strong>for</strong> both 1997 <strong>and</strong> 1992. Eight vehicle characteristics were <strong>of</strong> interest:<br />

# empty (tare) weight<br />

# average gross weight<br />

# maximum gross weight<br />

# external width <strong>of</strong> trailer<br />

# overall length<br />

# annual vehicle miles <strong>of</strong> travel (VMT)<br />

# base <strong>of</strong> operation<br />

# range <strong>of</strong> operation—% <strong>of</strong> VMT operating in different lengths <strong>of</strong> haul<br />

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