AAR:

Association of American Railroads

ADA:

Americans with Disabilities Act

APTA:

American Public Transportation Association

ATPI:

Air Travel Price Index

ATTI:

Air Travel Time Index

ATTVI:

Air Travel Time Variability Index

BEA:

Bureau of Economic Analysis

BLS:

Bureau of Labor Statistics

BTS:

Bureau of Transportation Statistics

Btu:

British thermal unit

CAFE:

Corporate Average Fuel Economy

CBP:

U.S. Customs and Border Protection

CFS:

Commodity Flow Survey

CO:

carbon monoxide

CO2:

carbon dioxide

CPI:

Consumer Price Index

CPSC:

Consumer Product Safety Commission

DHS:

U.S. Department of Homeland Security

DOC:

U.S. Department of Commerce

DOE:

U.S. Department of Energy

DOL:

U.S. Department of Labor

DOT:

U.S. Department of Transportation

dwt:

deadweight tons

EIA:

Energy Information Administration

EPA:

U.S. Environmental Protection Agency

FAA:

Federal Aviation Administration

FHWA:

Federal Highway Administration

FMCSA:

Federal Motor Carrier Safety Administration

FRA:

Federal Railroad Administration

FTA:

Federal Transit Administration

FY:

fiscal year

GDP:

Gross Domestic Product

GHG:

greenhouse gas

GIS:

geographic information systems

GTFS:

Government Transportation Financial Statistics

GVWR:

gross vehicle weight rating

HMIS:

Hazardous Materials Information System

ISTEA:

Intermodal Surface Transportation Efficiency Act

ITS:

intelligent transportation system

MARAD:

Maritime Administration

MFP:

multifactor productivity

MISLE:

Marine Information and Safety Law Enforcement

mmtc:

million metric tons of carbon

mpg:

miles per gallon

mph:

miles per hour

MPO:

metropolitan planning organization

MSA:

metropolitan statistical area

NAICS:

North American Industry Classification System

NCFO:

National Census of Ferry Operators

NCFRP:

National Cooperative Freight Research Program

NEI:

National Emissions Inventory

NEISS:

National Electronic Injury Surveillance System

NHTS:

National Household Travel Survey

NHTSA:

National Highway Traffic Safety Administration

NOS:

Not Otherwise Specified

NOX:

nitrogen oxides

NPIAS:

National Plan of Integrated Airport Systems

NTAD:

National Transportation Atlas Database

NTD:

National Transit Database

NTS:

National Transportation Statistics report

NTSB:

National Transportation Safety Board

O&D:

origin and destination

OECD:

Organization for Economic Cooperation and Development

OOS:

out of service

OPEC:

Organization of Petroleum Exporting Countries

PHMSA:

Pipeline and Hazardous Materials Safety Administration

PM-2.5:

particulate matter of 2.5 microns in diameter or smaller

PM-10:

particulate matter of 10 microns in diameter or smaller

pmt:

passenger-miles of travel

quads:

quadrillions

RITA:

Research and Innovative Technology Administration

rpm:

revenue passenger-mile

SAFETEA-LU:

Safe, Accountable, Flexible, Efficient Transportation Equity ActA Legacy for Users

SCTG:

Standard Classification of Transported Goods

SE:

standard error

SIC:

Standard Industrial Classification

STOL:

short take-off and landing

SUV:

sport utility vehicle

TEA-21:

Transportation Equity Act for the 21st Century

TEU:

20-foot equivalent unit

TgCO2Eq:

teragrams of carbon dioxide equivalent

TSAR:

Transportation Statistics Annual Report

TRB:

Transportation Research Board

TSI:

Transportation Services Index

TTI:

Texas Transportation Institute

TTI:

Travel Time Index

TWIC:

Transportation Worker Identification Credential

USACE:

U.S. Army Corps of Engineers

USCG:

U.S. Coast Guard

USDOT:

U.S. Department of Transportation

VIUS:

Vehicle Inventory and Use Survey

vmt:

vehicle-miles of travel

VOC:

volatile organic compounds