Common Acronyms
| ADA | Americans with Disabilities Act |
| ADT | Average Daily Traffic |
| AVL | Automatic Vehicle Locator |
| CAA | Clean Air Act (see EPA's
"Plain English Guide" ) |
| CAAA | Clean Air Act Amendments of 1990 |
| CBD | Central Business District |
| CMAQ | Congestion
Mitigation and Air Quality funds |
| CMS | Congestion Management System |
| CNST | Construction (phase of a project) |
| DOT | Department of Transportation |
| E+C | Existing plus committed network (used in modeling) |
| EA | Environmental
Assessment |
| EIS | Environmental
Impact Statement |
| ENG | Engineering (phase of a project) |
| EPA | Environmental
Protection Agency |
| FAA | Federal
Aviation Administration |
| FAU | Federal-Aid Urban |
| FHWA | Federal
Highway Administration |
| FRA | Federal
Railroad Administration |
| FTA | Federal
Transit Administration |
| FY | Fiscal Year (federal, runs from October to September) |
| GIS | Geographic Information Systems |
| HOV | Highway Performance Monitoring System |
| HPMS | Highway
Performance Monitoring System |
| IM | Interstate Maintenance funds |
| ISTEA | Intermodal Surface Transportation Efficiency Act of 1991 |
| ITS | Intelligent Transportation Systems |
| IVHS | Intelligent Vehicle and Highway Systems (former term for ITS) |
| LOS | Level of Service - performance measure |
| LRTP | Long Range Transportation Plan |
| MPO | Metropolitan Planning Organization |
| MTA | Metro
Transit Authority |
| NEPA | National
Environmental Policy Act |
| NHS | National
Highway System funds |
| NOx | Nitrogen
Oxides(ozone-causing
pollutants) |
| PE | Preliminary Engineering (phase of a project) |
| ROW | Right-of-Way (phase of a project) |
| RTA | Regional
Transportation Authority |
| SIP | State
Implementation Planfor
achieving air quality goals |
| SR | State Route |
| STA | State gas tax funds |
| STIP | Statewide Transportation Improvement Program |
| STP | Surface
Transportation Program funds |
| TAZ | Traffic Analysis Zone (used in modeling) |
| TCC | Technical Coordinating Committee |
| TDM | Transportation Demand Management (also called Transportation
Control Measures,
or TCMs) |
| TDOT | Tennessee
Department of Transportation |
| TEA-21 | Transportation
Equity Act for the 21st Century |
| TIP | Transportation Improvement Program |
| TMA | Transportation Management Association |
| TSM | Transportation System Management |
| UPWP | Unified Planning Work Program |
| US DOT | United
States Department of Transportation |
| V/C | Volume to Capacity ratio - measures roadway congestion |
| VMT | Vehicle Miles Traveled |
| VOC | Volatile
Organic Compounds(air
pollutants) |
