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Comprehensive Truck Size and Weight Limits Study - Data Acquisition and Technical Analysis Plan

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April 2016

U.S. Department of Transportation Federal Highway Administration logo

Table of Contents

Chapter 1 Introduction
1.1 Task Objective
1.2 Data and Model Requirements for Each Task Area
1.2.1 Task V.A. Highway Safety and Truck Crash Analysis: Data Requirements
1.2.2 Task V.B. Pavement Analysis: Data Requirements
1.2.3 Task V.C. Bridge Comparative Analysis: Data Requirements
1.2.4 Task V.D. Compliance Comparative Analysis Data Requirements
1.2.5 Task V.E. Modal Shift Analysis: Data Requirements
1.3 VMT and Weight Distribution Estimates Methodology
1.3.1 Summary
1.3.2 VMT Control Totals
1.3.3 Splitting VMT among States, Highway Functional Classes, and 13 FHWA Vehicle Classes
1.3.4 Splitting VMT into 28 Vehicle Classes Used in 2014 CTSW Study
1.3.5 Adjusting VMT to 2011 Published Control Totals
1.3.6 Operating Weight and Axle Weight Distributions
Appendix A CTSW Vehicle Classification Algorithm for Use in Analyzing WIM Data

List of Figures

Figure No. Figure Title
1 High Level 2014 CTSW Study Work Flowchart by Task
2 VMT by OGW and Truck Class, All Highways
3 VMT by OGW and Truck Class, All Highways without SU3 and 3-S2
4 3-S2 Tandem Axle Weights by OGW (Kips)

List of Tables

Table No. Table Title
1 Truck Configurations and Weight Scenarios Analyzed in the 2014 CTSW Study
2 2014 CTSW Study Models and Data Utilized by Task
3 2014 CTSW Study Data/Model Accessibility and Data Custody Guidelines
4 2014 CTSW Study Generic Data Agreement
5 Modal Shift Data Requirements and Sources
6 VMT Control Totals
7 Vehicle Classifications Used in the 2014 CTSW Study

List of Acronyms

Acronym Definition
AASHO American Association of State Highway Officials
AASHTO Association of State Highway and Transportation Officials
ABrR AASHTOWare Bridge Rating®
ABS anti-lock braking system
AC asphalt concrete
ADT average daily traffic
AADTT annual average daily truck traffic
ADTT average daily truck traffic
AF axle factors
AGM average gross mass
ALF axle load factors
ARA Applied Research Associates
ASLRRA American Short Line and Regional Railroad Association
ASR allowable stress rating
BTS Bureau of Transportation Statistics
CAFT constant-amplitude fatigue threshold
CARB California Air Resources Board
CBO Congressional Budget Office
CMV commercial motor vehicle
CRCP Continuously Reinforced Concrete Pavement
CRF Code of Federal Regulations
CTSLW Comprehensive Truck Size and Weight Limits Study
CTSW Comprehensive Truck Size and Weight Limits
CVSA Commercial Vehicle Safety Alliance
DA data agreement
DOT Department of Transportation
EDFs equivalent damage factors
ESALs equivalent single axle loads
ESAR equivalent single-axle radius
ESWL equivalent single-wheel load
FAF Freight Analysis Framework
FEA finite element analysis
FHWA Federal Highway Administration
FMIS Financial Management Information System
FMVSS Federal Motor Vehicle Safety Standard
FRA Federal Railroad Administration
GCW gross combined weight
GEF Group Equivalency Factor
GVW gross vehicle weight
HCA highway cost allocation
HCAS Federal Highway Cost Allocation Study
HERS Highway Economic Requirements Systems
HMA hot mix asphalt
HPMS Highway Performance Monitoring System
HV High-volume
HIS Interstate Highway System
ITIC Intermodal Transportation and Inventory Cost Model
IRI International Roughness Index
IS Interstate System
ISTEA Intermodal Surface Transportation Efficiency Act
JPCP jointed plain concrete pavement
LCC life cycle cost
LCV longer combination vehicles
LEF load equivalence factors
LFR load factor rating
LRFD load and resistance factor design
LRFR load resistance factor rating
LTBP Long-Term Bridge Performance Program
LTL less than truckload
LTPP Long-Term Pavement Performance
LV Low-volume
MARAD Maritime Administration
MATLAB Matrix Laboratory
MCMIS Motor Carrier Management Information System
MDDs multidepth deflectometers
MEPDG Mechanistic Empirical Pavement Design Guide
MV Medium-volume
NAPCOM National Pavement Cost Model
NAS National Academy of Sciences
NATS National Truck Stop Survey
NBI National Bridge Inventory
NBMD National Bridge Management Database
NCHRP National Cooperative Highway Research Program
NDA non-disclosure agreement
NESCCAF Northeast States Center for a Clean Air Future
NHS National Highway System
NHTSA National Highway Traffic Safety Administration
NN National Network
NREL National Renewable Energy Lab
NSIs normalized sensitivity indices
OMB Office of Management and Budget
OGW operating gross weight
ORNL Oak Ridge National Laboratories
OOS out-of-service
OS/OW oversize/overweight
PBBT Performance Based Brake Tests
PAS Pavement Analysis Software
PBS Performance-based standards
PCC Portland Cement Concrete
PCE passenger car equivalents
PCU passenger car units
POG Policy Oversight Group
PSI Pounds per square inch
RC reinforced concrete
RF rating factor
SISSI Superpave Instrumented Stress-Strain Investigation
SPS Special Pavement Sections
STAA Surface Transportation Authorization Act
STB Surface Transportation Board
STCC Standard Transportation Commodity Code
SwRI Southwest Research Institute
TF truck factor
TMG Traffic Monitoring Guidelines
TOC Technical Oversight Committee
TRB Transportation Research Board
TSW truck size and weight
TTCGS truck traffic classification groups
USC United States Code
USDOT US Department of Transportation
VMT vehicle miles traveled
VIUS Vehicle Inventory and Use Survey
VSC vehicle stability and control
WHVC World Harmonized Vehicle Cycle
WIM weigh-in-motion
WIMPI Weigh-in-Motion Pavement Investigation

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