| AASHTO |
American Association of State Highway and Transportation Officials |
| ACE |
Altamont Commuter Express |
| ADA |
Americans with Disabilities Act of 1990 |
| ADT |
average daily traffic |
| AEO |
Annual Energy Outlook 2010 |
| APTA |
American Public Transportation Association |
| ATM |
Active Traffic Management |
| BAB |
Build America Bond |
| BAC |
blood alcohol concentration |
| BART |
San Francisco Bay Area Rapid Transit District |
| BCR |
benefit-cost ratio |
| BIRM |
Bridge Inspectors Reference Manual |
| BLS |
Bureau of Labor Statistics |
| BPI |
Bid Price Index |
| BRT |
Bus Rapid Transit |
| BTS |
Bureau of Transportation Statistics |
| BTU |
British thermal unit |
| C&P |
Conditions and Performance |
| CAFE |
Corporate Average Fuel Economy |
| CAT |
Climate Action Team, Climate Advisory Team |
| CATA |
Central Arkansas Transit Authority |
| CATS |
Charlotte Area Transit System |
| CDOT |
Connecticut Department of Transportation |
| CEA |
Council of Economic Advisers |
| CEQ |
Council on Environmental Quality |
| CFC |
chlorofluorocarbon |
| CFR |
U.S. Code of Federal Regulations |
| CFS |
Commodity Flow Survey |
| CH4 |
methane |
| CMAQ |
Congestion Mitigation and Air Quality |
| CMTA |
Capital Metropolitan Transportation Authority |
| CNT |
Center for Neighborhood Technology |
| CO2 |
carbon dioxide |
| CO2e |
CO2 equivalent |
| COT |
City of Tucson |
| CPI |
Consumer Price Index |
| CSS |
context sensitive solution |
| CTA |
Chicago Transit Authority |
| DART |
Dallas Area Rapid Transit |
| DHS |
U.S. Department of Homeland Security |
| DO |
directly operated |
| DOT |
Department of Transportation |
| DOT&PF |
Alaska Department of Transportation and Public Facilities |
| DTC |
Delaware Transit Corporation |
| DTS |
City and County of Honolulu Department of Transportation Services |
| EDC |
Every Day Counts |
| EIA |
Energy Information Administration |
| EPA |
U.S. Environmental Protection Agency |
| FAF |
Freight Analysis Framework |
| FARS |
Fatality Analysis Reporting System |
| FHWA |
U.S. Federal Highway Administration |
| FMCSA |
Federal Motor Carrier Safety Administration |
| FPM |
freight performance measurement |
| FTA |
Federal Transit Administration |
| FY |
fiscal year |
| g/dL |
gram per deciliter |
| GARVEE |
Grant Anticipation Revenue Vehicle |
| GCRTA |
The Greater Cleveland Regional Transit Authority |
| GDP |
gross domestic product |
| GHG |
greenhouse gas |
| GIS |
geographic information system |
| GP |
general purpose |
| GPS |
Global Positioning System |
| GreenLITES |
Green Leadership in Transportation Environmental Sustainability |
| HART |
Hillsborough Area Regional Transit Authority |
| HERS |
Highway Economic Requirements System |
| HFC |
hydrofluorocarbon |
| HFCS |
Highway Functional Classification System |
| HMA |
hot-mix asphalt |
| HOT |
high-occupancy toll |
| HOV |
high-occupancy vehicle |
| HPMS |
Highway Performance Monitoring System |
| HPMS-AP |
HPMS Analytical Process |
| HRRR |
High Risk Rural Roads Program |
| HRT |
Hampton Roads Transit |
| HTF |
Highway Trust Fund |
| HUD |
U.S. Department of Housing and Urban Development |
| ICM |
Integrated Corridor Management |
| IDAS |
ITS Deployment Analysis System |
| IFTWG |
Intermodal Freight Technology Working Group |
| INVEST |
Infrastructure Voluntary Evaluation Sustainability Tool |
| IPCC |
Intergovernmental Panel on Climate Change |
| IRI |
International Roughness Index |
| ISTEA |
Intermodal Surface Transportation Efficiency Act of 1991 |
| IT |
Island Transit |
| ITS |
intelligent transportation system(s) |
| King County Metro |
King County Department of Transportation |
| KT |
Kenosha Transit |
| LACMTA |
Los Angeles County Metropolitan Transportation Authority |
| LDV |
light-duty vehicle |
| LEED |
Leadership in Energy and Environmental Design |
| LID |
Low Impact Development |
| LNG |
liquefied natural gas |
| LPG |
liquefied petroleum gas |
| MARTA |
Metropolitan Atlanta Rapid Transit Authority |
| MATA |
Memphis Area Transit Authority |
| MBTA |
Massachusetts Bay Transportation Authority |
| MCCC |
Maryland Climate Change Commission |
| MDT |
Miami-Dade Transit |
| Metra |
Northeast Illinois Regional Commuter Railroad Corporation |
| METRO |
Bi-State Development Agency; Metropolitan Transit Authority of |
| |
Harris County, Texas; Metro Regional Transit Authority |
| Metrolink |
Southern California Regional Rail Authority |
| MOVES |
Motor Vehicle Emission Simulator |
| mpg |
miles per gallon |
| mph |
miles per hour |
| MPO |
metropolitan planning organization |
| MR&R |
maintenance, repair, and rehabilitation |
| MTA |
Mass Transit Account, Metropolitan Transportation Authority, Maryland Transit Administration |
| MTA LIRR |
MTA Long Island Rail Road |
| MTA-MNCR |
Metro-North Commuter Railroad Company |
| MTS |
San Diego Metropolitan Transit System |
| MTSI |
mean time to service interruption |
| MUNI |
San Francisco Municipal Railway |
| N2O |
nitrous oxide |
| NBI |
National Bridge Inventory |
| NBIAS |
National Bridge Investment Analysis System |
| NBIS |
National Bridge Inspection Standards |
| NCHRP |
National Cooperative Highway Research Program |
| NCTD |
North County Transit District |
| NEPA |
National Environmental Policy Act |
| NFT Metro |
Niagara Frontier Transportation Authority |
| NHCCI |
National Highway Construction Cost Index |
| NHS |
National Highway System |
| NHTS |
National Household Travel Survey |
| NHTSA |
National Highway Traffic Safety Administration |
| NICTD |
Northern Indiana Commuter Transportation District |
| NIPA |
U.S. National Income and Product Accounts |
| NJ TRANSIT |
New Jersey Transit Corporation |
| NNEPRA |
Northern New England Passenger Rail Authority |
| NOAA |
National Oceanic and Atmospheric Administration |
| NOx |
nitrogen oxide |
| NORTA |
New Orleans Regional Transit Authority |
| NTD |
National Transit Database |
| NTPP |
Nonmotorized Transportation Pilot Program |
| NYCT |
MTA New York City Transit |
| OMB |
Office of Management and Budget |
| OSTP |
Office of Science and Technology Policy |
| P3 |
Public-Private Partnership |
| PAB |
Private Activity Bond |
| PATCO |
Port Authority Transit Corporation |
| PATH |
Port Authority Trans-Hudson Corporation |
| PCJPB |
Peninsula Corridor Joint Powers Board |
| PENNDOT |
Pennsylvania Department of Transportation |
| PFC |
perfluorocarbon |
| PM-10 |
particulate matter of 10 microns in diameter or smaller |
| PMT |
passenger miles traveled |
| Port Authority |
Port Authority of Allegheny County |
| PPI |
Producer Price Index |
| PRHTA |
Puerto Rico Highway and Transportation Authority |
| PSR |
Present Serviceability Rating |
| PT |
purchase transportation |
| RAP |
reclaimed asphalt pavement |
| RCTC |
Riverside County Transportation Commission |
| RPTA |
Regional Public Transportation Authority |
| RTA |
Regional Transportation Authority |
| RTD |
Denver Regional Transportation District |
| RTP |
Regional Transportation Plan |
| Sacramento RT |
Sacramento Regional Transit District |
| SAFETEA-LU |
Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users |
| SCS |
Sustainable Communities Strategy |
| SEPTA |
Southeastern Pennsylvania Transportation Authority |
| SF6 |
sulfur hexafluoride |
| SGR |
State of Good Repair |
| SIB |
State Infrastructure Bank |
| SIRTOA |
Staten Island Rapid Transit Operating Authority |
| SQC |
Synthesis, Quantity, and Condition |
| ST |
Central Puget Sound Regional Transit Authority |
| STRAHNET |
Strategic Highway Network |
| SUV |
sports utility vehicle |
| TEA-21 |
Transportation Equity Act for the 21st Century |
| TEAM |
Transit Electronic Award Management |
| TERM |
Transit Economic Requirements Model |
| The T |
Fort Worth Transportation Authority |
| TIFIA |
Transportation Infrastructure and Finance Innovation Act |
| TIGER |
Transportation Investment Generating Economic Recovery |
| TIGGER |
Transit Investment for Greenhouse Gas and Energy Reduction |
| TMC |
traffic management center |
| TOD |
Transit-Oriented Development |
| TRB |
Transportation Research Board |
| TriMet |
Tri-County Metropolitan Transportation District of Oregon |
| TRI-Rail |
South Florida Regional Transportation Authority |
| TTI |
Texas Transportation Institute |
| TVT |
Traffic Volume Trends |
| UCR |
Urban Congestion Report |
| UN |
United Nations |
| U.S.C. |
United States Code |
| U.S. DOT |
United States Department of Transportation |
| UTA |
Utah Transit Authority |
| UZA |
urbanized area |
| Valley Metro |
City of Phoenix Public Transit Department |
| V/SF |
volume to service flow |
| VHT |
vehicle-hours of travel |
| VII |
Vehicle Infrastructure Integration |
| VIUS |
Vehicle Inventory and Use Survey |
| VMT |
vehicle miles traveled |
| VRE |
Virginia Railway Express |
| VRM |
vehicle revenue mile |
| VSL |
variable speed limit |
| VTA |
Santa Clara Valley Transportation Authority |
| WMA |
warm mix asphalt |
| WMATA |
Washington Metropolitan Area Transit Authority |
