Appendix A: List of Acronyms

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

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
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
NEI National Emissions Inventory
NEISS National Electronic Injury Surveillance System
NHTS National Household Travel Survey
NHTSA National Highway Traffic Safety Administration
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

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 Act-A 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 container 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

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