AADT Annual Average Daily Traffic
AASHTO American Association of State Highway and Transportation Officials
ACRP Airport Cooperative Research Program
ADT Average Daily Traffic
AEO Annual Energy Outlook
AFLEET Alternative Fuel Life-Cycle Environmental and Economic Transportation
CAFE Corporate Average Fuel Economy
CAPCOA California Air Pollution Control Officers Association
CARB California Air Resources Board
CCAP Center for Clean Air Policy
CE Categorical Exclusion
CEQ Council on Environmental Quality
CEQA California Environmental Quality Act
CFC Chlorofluorocarbon
CFL Compact Fluorescent Light 
CH4 Methane
CMAQ Congestion Mitigation and Air Quality Improvement
CO Carbon Monoxide
CO2 Carbon Dioxide
CO2e Carbon Dioxide Equivalent
CS Cambridge Systematics
CURB Climate Action for Urban Sustainability
DDOT District of Columbia Department of Transportation
DEFRA Department for Environment, Food, and Rural Affairs
DelDOT Delaware Department of Transportation
DEQ Diesel Emissions Quantifier
DOE Department of Energy
DOT Department of Transportation
E3 Energy and Environmental Economics, Inc.
EA Environmental Assessment
EERPAT Energy and Emissions Reduction Policy Analysis Tool
EIS Environmental Impact Statement
EMFAC Emission Factor
EMS Environmental Management Systems
EPA Environmental Protection Agency
EPD Environmental Product Declaration
EPEAT Electronic Product Environmental Assessment Tool
ESCO Energy Service Company
EV Electric Vehicle
EVSE Electric Vehicle Supply Equipment
FHWA Federal Highway Administration
GASCAP Greenhouse-Gas Assessment Spreadsheet for Capital Projects
GGRP Greenhouse Gas Reduction Act Plan
GHG Greenhouse Gas
GIS Geographic Information System
GPC Global Protocol for Community-Scale Greenhouse Gas Emission Inventories
GREET Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation
GUI Graphical User Interface
GWP Global Warming Potential
HC Hydrocarbons
HDVEC Heavy-Duty Vehicle Emissions Calculator
HERS Highway Economic Requirements System
HFC Hydrofluorocarbon
HFO Hydrofluoroolefin
HOT High-Occupancy Toll
HOV High-Occupancy Vehicle
HPMS Highway Performance Monitoring System
HVAC Heating, Ventilation, and Air Conditioning
ICCT International Council on Clean Transportation
ICE Infrastructure Carbon Estimator
ICE Inventory of Carbon and Energy
INVEST Infrastructure Voluntary Evaluation Sustainability Tool
IPCC Intergovernmental Panel on Climate Change
ITS Intelligent Transportation System
LDV Light-Duty Vehicle
LED Light-Emitting Diode
LEED Leadership in Energy and Environmental Design
LRTP Long-Range Transportation Plan
MAP-21 Moving Ahead for Progress in the 21st Century Act
MassDOT Massachusetts Department of Transportation
MCCC Maryland Commission on Climate Change
MDOT Maryland Department of Transportation
mmt Million metric tons
MnDOT Minnesota Department of Transportation
MOVES Motor Vehicle Emission Simulator
MPO Metropolitan Planning Organization
MSAT Mobile Source Air Toxics
MT Metric Ton
N2O Nitrous Oxide
NAS National Academy of Sciences
NASEM National Academies of Sciences, Engineering, and Medicine
NCEI National Centers for Environmental Information
NCHRP National Cooperative Highway Research Program
NEPA National Environmental Policy Act
NGO Nongovernmental Organization
NHS National Highway System
NO2 Nitrogen Dioxide
NRC National Research Council
NRMCA National Ready Mixed Concrete Association
ORNL Oak Ridge National Laboratory
PaLATE Pavement Life-Cycle Assessment Tool
PBOT Portland Bureau of Transportation (Oregon)
PBPP Performance-Based Planning and Programming
PEV Plug-in Electric Vehicle
PM Particulate Matter
RAP Recycled Asphalt Pavement
REC Renewable Energy Certificate
RPAT Regional Policy Analysis Tool
RSPM Regional Strategic Planning Model
SCM Supplemental Cementitious Material
SEPA State Environmental Policy Act
SHRP 2 Strategic Highway Research Program 2
SPR State Planning and Research
STAC Sustainable Transportation Advisory Council (Minnesota DOT)
STIP Statewide Transportation Improvement Program
STS Statewide Transportation Strategy
TCAPP Transportation for Communities: Advancing Projects through Partnerships
TCI Transportation and Climate Initiative
TDM Transportation Demand Management
TIP Transportation Improvement Program
TRB Transportation Research Board
TRIMMS Trip Reduction Impacts of Mobility Management Strategies
TSM&O Transportation Systems Management and Operations
USEEIO U.S. Environmentally-Extended Input-Output
U.S. GCRP U.S. Global Change Research Program
VMT Vehicle Miles Traveled
WARM Waste Reduction Model
WSDOT Washington State Department of Transportation
ZEV Zero-Emission Vehicle

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