Appendix A: List of Acronyms and Initialisms

Appendix A: List of Acronyms and Initialisms

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z


AADT average annual daily traffic

ADA Americans with Disabilities Act

AFV alternative fuel vehicle


BAC blood alcohol concentration

BEA Bureau of Economic Analysis

BLS Bureau of Labor Statistics

BTS Bureau of Transportation Statistics

Btu British thermal unit


CAA Clean Air Act

CAFE Corporate Average Fuel Economy

CFR Code of Federal Regulations

CFS Commodity Flow Survey

CO carbon monoxide

CO2 carbon dioxide

CRAF Civil Reserve Air Fleet


DGPS Differential Global Positioning System

DOC U.S. Department of Commerce

DOD U.S. Department of Defense

DOE U.S. Department of Energy

DOI U.S. Department of the Interior

DOL U.S. Department of Labor

DOT U.S. Department of Transportation

dwt deadweight tons


EDS Explosive Detection Systems

EIA Energy Information Administration

EJ environmental justice

EPA U.S. Environmental Protection Agency

ETC electronic toll collection

ETMS Enhanced Traffic Management System


FAA Federal Aviation Administration

FAF Freight Analysis Framework

FARs Federal Aviation Regulations

FARS Fatality Analysis Reporting System

FHWA Federal Highway Administration

FMCSA Federal Motor Carrier Safety Administration

FRA Federal Railroad Administration

FTA Federal Transit Administration

FY fiscal year


GA general aviation

GAO General Accounting Office

GDD Gross Domestic Demand

GDP Gross Domestic Product

GHG greenhouse gas

GIS geographic information systems

GPRA Government Performance and Results Act

GPS Global Positioning System


HAPs hazardous air pollutants

HELP Heavy Vehicle Electronic License Plate

HMIS Hazardous Materials Information System

HPMS Highway Performance Monitoring System

HSR high-speed rail

HTF Highway Trust Fund


IBET Intermodal Bottleneck Evaluation Tool

INS Immigration and Naturalization Service

IPCC Intergovernmental Panel on Climate Change

ISTEA Intermodal Surface Transportation Efficiency Act

IT information technology

ITS intelligent transportation system


LNG liquefied natural gas

LPG liquefied petroleum gas

LTV light trucks and vans


MARAD Maritime Administration

MMLD Merchant Mariner Licensing Documentation

mmtc million metric tons of carbon

mpg miles per gallon

mph miles per hour

MPO metropolitan planning organization

MSATs mobile source air toxics

MSP Maritime Security Programs

MSW municipal solid waste

MTBE methyl-tertiary-butyl-ether


NAFTA North American Free Trade Agreement

NAS National Airspace System plan

NASS GES National Automotive Sampling System General Estimates System

NDRF National Defense Reserve Fleet

NHTS National Household Travel Survey

NHTSA National Highway Traffic Safety Administration

NO2 nitrogen dioxide

NOX nitrogen oxides

NPIAS National Plan of Integrated Airport Systems

NPL National Priorities List

NPTS Nationwide Personal Transportation Survey

NTL National Transportation Library

NTSB National Transportation Safety Board


OMB Office of Management and Budget

OPEC Organization of Petroleum Exporting Countries

OPS Office of Pipeline Safety

OSRA Ocean Shipping Reform Act


PFD personal flotation device

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

PSC Port State Control

PSR Present Serviceability Rating

PTC positive train control

PUV personal-use vehicle


quads quadrillion


RFG reformulated gasoline

ROR run-off-the-road

RRF Ready Reserve Fleet

RSPA Research and Special Programs Administration


SCTG Standard Classification of Transported Goods

SO2 sulfur dioxide

STRAHNET Strategic Highway Network

SUV sport utility vehicle


TEA-21 Transportation Equity Act for the 21st Century

TEU 20-foot equivalent container unit

TICSA Transportation Infrastructure Capital Stock Account

TTI Texas Transportation Institute


UNFCC United Nations Framework Convention on Climate Change

USCG U.S. Coast Guard

USGS U.S. Geological Survey

UST underground storage tank


vmt vehicle-miles of travel

VOC volatile organic compounds