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

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Annual Vehicle Miles Traveled (VMT) Each surveyed truck indicated their estimated annual vehicle miles traveled (i.e., VMT) for the year. Its variable name in the VIUS database was ANNMIL. Trailer Width Each combination vehicle was asked to report the width of the trailer most often attached to it. The 1997 WIDTH variable levels were (1) 96 inches, (2) 102 inches, (3) More than 102 inches, or (4) Other. Vehicle Length Each vehicle was asked to report the overall length of their vehicle as it was most often operated. For 1997, the respondents had 14 length categories from which to choose. This variable is called TOTLEN. % of VMT Outside Home Base State Each vehicle was asked to report the percent of the year’s mileage that was driven outside of the home base state where home base state refers to the state where the vehicle was usually parked when it was not on the road. (Note: Home base state and state of registration are not always the same.) In the database, this variable was called POBAST. This analysis, was primarily interested in the number of vehicles who reported that all of their VMT was driven inside the home base state. Therefore, the home base graphs referred to in section 7 of the report and presented in Appendix E are counts of the number of vehicles at different levels of % of VMT outside of home base state. The most important information on these plots is the number of vehicles who report all their VMT is driven within their home base state. This is obtained by looking at the value plotted at 0% of VMT outside of home base state. Range of Operation Each vehicle was asked to report the percent of the year’s mileage that was driven on various lengths of trips. In 1997, there were 6 trip range levels. The following table gives the ranges, and the VIUS variable associated with each range. Range 1997 Off Road POFFRD 0-50 Miles PLOCAL 50-100 Miles PSHORT H - 8 100-200 Miles PSMED 200-500 Miles PLMED > 500 Miles PLONG Before analyzing the data, it was insured that the total % of VMT distributed across the various range levels totaled to 100% for each record. Data that totaled to 0 were ignored in the analysis. No correction was necessary for the 1997 because the Bureau of Census had already done corrections to the records such that they totaled to 100%.
Since the analysis was focused on the distribution of a vehicle group’s VMT across the various trip range levels, it was necessary to convert the % of VMT units to VMT. This process involved dividing the % of VMT for a range by 100 to get a proportion of the VMT accounted for by this type of trip, then multiplying this value by annual miles traveled (e.g., for a given record, the VMT spent on a local trip would be calculated by the following formula: VMT(local)=(PLOCAL*ANNMIL/100). Vehicle Weight The mean empty, average, and maximum weights were calculated for various vehicle configurations. In deriving the means, some weight data was excluded from the analysis because it was felt to be invalid data based on our knowledge of general operational characteristics of the commercial vehicles. The restrictions are mentioned below. VIUS Weight Variables. Weight Variable Empty (tare) Weight Average Weight Maximum Weight Restrictions on Weight Variables: Weight Variable Empty (tare) Weight Average Weight Maximum Weight Payload Weight Variable Name 1997 EMPWT AVGWT MAXWT Lower limit Exclude 20,000 and below Exclude 20,000 and below Exclude 20,000 and below In addition to the evaluation of the overall weight of a vehicle, the analysis was focused on the weight of the load carried by a vehicle configuration. Since there was no question on the survey that directly addressed this issue, we derived an estimate of the average payload weight by subtracting the empty weight of the vehicle from its average weight. In addition, subtracting the empty weight of the vehicle from its maximum weight derived maximum payload weight. The previously mentioned restrictions on the weight variables applied in this analysis with an added condition that the reported empty weight had to be less than the reported average or maximum weight. H - 9
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Federal Highway Administration Offi
Page 3 and 4:
The primary objectives of this repo
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# Survey and population estimates a
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# Tank truck, liquids or gas # Othe
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TABLE ES-1 1992 U.S. COMMERCIAL FRE
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Table of Contents 1.0 Introduction
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List of Tables Table 2.1-1 The 5 Ma
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1.0 Introduction 1.1 Purpose and Sc
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Small Sample Size. In general, read
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Table 2.1-1 The 5 Major Vehicle Con
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Figure 2.2-1 Vehicle Group Descript
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7) Doubles @ 6 + Axles 8) Triples (
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3.0 Analysis of the Distribution of
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Table 3.2-1 1997 Total Truck Fleet
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3.4 Size of the 5-Axles or More Fle
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Number of Vehicles 1,400,000 1,300,
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Table 3.4-2 1997 Truck Fleet (@ 5-a
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# California has the largest state
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Table 3.5-1 Truck Fleet (@ 5-axles
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% of Fleet 100 90 80 70 60 50 40 30
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# 8 vehicle groups (see Section 2.2
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Truck Fleet (5-axles or more) Numbe
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Other Grain Bodies Tank Truck, Liqu
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Number of Vehicles 1,400,000 1,200,
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- household moving and office furni
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# For all truck + trailer combinati
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6.0 Analysis of the 5-Axles or More
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# For the 3-S2 group, - One-fifth o
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7.0 Analysis of Weights, Dimensions
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7.2 Observations on Specific Truck
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# (3 + 2) Basic Enclosed Van [pop =
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- Annual VMT—mixed. # (3-S2) Insu
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- half (40-60%) operate mostly (80-
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# (3-S3) Tank Trucks for Liquids or
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Body Type Low Boy Platform Basic Pl
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Body Type Low Boy Platform Basic Pl
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There has been a substantial increa
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3-S2 Basic Enc. Van 3-S2 Refrigerat
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7.5.2 Changes in Truck Lengths by 1
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7.5.3 Changes in Truck Weights # ME
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Table 7.5.3-2 Comparison of Mean "A
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Average Weight (lbs) 80,000 70,000
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Comparison of Mean Maximum Payload
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Comparison of Mean "Average" Payloa
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8.0 Analysis of Vehicle Miles of Tr
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CHANGES BETWEEN 1992 AND 1997 Figur
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Mean VMT 100,000 90,000 80,000 70,0
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Appendix A Regional Distributions o
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1997 Truck Fleet Traffic Region: No
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1997 Truck Fleet Traffic Region: So
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Appendix B Regional Distributions o
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Not to Scale Truck + Trailer @ 6 or
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Not to Scale $ $ Tridem Axle Tracto
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2-S1-2 STAA Tractor + Double Traile
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Not to Scale $ $ $ $ $ $ Base Scale
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1997 Truck Fleet (@ 5-axles or more
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Appendix C Detailed Body Type Analy
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Appendix C 1997 Truck Fleet (@ 5-ax
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Appendix E Weights, Dimensions, and
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VEHICLE TYPE: 3-S2 BODY TYPE: LOW B
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VEHICLE TYPE: 3-S2 BODY TYPE: LIVES
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VEHICLE TYPE: 3-S2 BODY TYPE: INSUL
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VEHICLE TYPE: 3-S2 BODY TYPE: BASIC
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VEHICLE TYPE: 3-S2 BODY TYPE: AUTOM
Page 151 and 152: VEHICLE TYPE: 3-S2 BODY TYPE: DUMP
Page 153 and 154: VEHICLE TYPE: 3-S2 BODY TYPE:TANK T
Page 155 and 156: VEHICLE TYPE: 3+2 BODY TYPE: BASIC
Page 157 and 158: VEHICLE TYPE: 3+2 BODY TYPE: POLE L
Page 159 and 160: VEHICLE TYPE: 3+2 BODY TYPE: DUMP T
Page 161 and 162: VEHICLE TYPE: 3-S3 BODY TYPE: LOW B
Page 163 and 164: VEHICLE TYPE: 3-S3 BODY TYPE: INSUL
Page 165 and 166: VEHICLE TYPE: 3-S3 BODY TYPE: POLE
Page 167 and 168: VEHICLE TYPE: 3-S3 BODY TYPE: DUMP
Page 169 and 170: VEHICLE TYPE: 2-S1-2 BODY TYPE: BAS
Page 171 and 172: VEHICLE TYPE: 2-S1-2 BODY TYPE: BAS
Page 173 and 174: Appendix F Average Payload Weights
Page 175 and 176: VEHICLE TYPE: 3-S2 AVERAGE PAYLOAD
Page 177 and 178: VEHICLE TYPE: STAA (2-S1-2) AVERAGE
Page 179 and 180: VEHICLE TYPE: 3-S2 MAXIMUM PAYLOAD
Page 181 and 182: VEHICLE TYPE: STAA (2-S1-2) MAXIMUM
Page 183 and 184: Regional Comparison of Mean Tare (E
Page 185 and 186: Regional Comparison of Mean Average
Page 187 and 188: Regional Comparison of Percent of T
Page 189 and 190: Regional Comparison of Percent of T
Page 191 and 192: Regional Comparison of the Mean Ann
Page 193 and 194: Regional Comparison of the Percent
Page 195 and 196: Appendix H Data Analysis Methodolog
Page 197 and 198: Configuration AXLRE Code 1997 4-S1
Page 199 and 200: Vehicle Body Type VIUS Variables of
Page 201: Major Body Type Groups and their As
Page 205 and 206: Industrial "waste" water Hazardous
Page 207 and 208: Simple Statistics In this analysis,
Page 209 and 210: PRNPRO 164-165 WANNMIL 166-178 VG 1
Page 211 and 212: Proc GLM data=dataset name; Class V
Page 213 and 214: RUN; H - 19
Page 215 and 216: U.S. DEPARTMENT OF COMMERCE BUREAU
Page 217 and 218: ITEM 5 Which best describes this ve
Page 219 and 220: ITEM 11 What type of cab does this
Page 221 and 222: ITEM 18 What percent of 1997 mileag
Page 223 and 224: . ITEM 27 Which of the following be
Page 225: ITEM 29 a. At any time during 1997
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