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

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Contact Information: FreightFeedback@dot.gov

April 2016

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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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