| 3-C | Continuing, Cooperative and Comprehensive Plannign Process |
| ADA | American with Disabilities Act |
| CAA | Clean Air Act |
| CFR | Code of Federal Regulations |
| CMAQ | Congestion Mitigation and Air Quality |
| CMP | Congestion Management Process |
| CSS/D | Context Sensitive Solutions and Design |
| EA | Environmental Assessment |
| EIA | Envionrmental Impact Statement |
| EJ | Environmental Justice |
| EPA | U.S. Environmental Protection Agency |
| FAST | Fixing America's Surfact Transportation Act |
| FEIS | Final Environmental Impact Statement |
| FHWA | Federal Highway Administration |
| FONSI | Finding of No Significant Impact |
| FRA | Federal Railroad Adminstration |
| GIS | Geographic Information Systems |
| HOV | High-Occupancy Vehicle |
| HSCTP | Human Services Coordianted Transportation Plan |
| HSIP | Highway Safety Improvement Program |
| I/M | Inspection and Maintenance |
| ISTEA | Intermodal Surface Transportation Efficiency Act |
| ITS | Intelligent Transportation Systems |
| LEP | Limited English Profiency |
| LRSTP | Long Range Statewide Transportation Plan |
| LRTP | Long Range Transportation Plan |
| MAP-21 | Moveing Ahead for Progress in the 21st Century Act |
| MATS | Mobile Area Transportation Study |
| MPO | Metropolitan Planning Organization |
| MTP | Metropolitan Transportation Plan |
| NAAQS | National Ambient Air Quality Standards |
| NEPA | National Environmental Policy Act |
| NHFN | National Highway Freight Network |
| NHFP | National Highway Freight Plan |
| NHPP | National Highway Performance Plan |
| NHS | National Highway System |
| PBPP | Performance-based Planning and Programming |
| PEL | Planning and Envionrment Linkages |
| PIP | Public Involvement Process |
| PL | Metropolitan Planning Funds |
| PM | Particulate Matter |
| PPM | Parts Per Million |
| PPP | Public Participation Plan |
| PTASP | Public Transportation Agency Safety Plan |
| RD&T | Research, Development and Technology Transfer |
| ROD | Record of Decision |
| RPO | Rural Planning Organization |
| RTPO | Tegional Transportation Planning Organization |
| SAFETEA-LU | Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users |
| SHSP | Strategic Highway Safety Plan |
| SIB | State Infrastructure Bank |
| SIP | State Implementation Plan |
| SPR | State Planning and Research |
| State DOT | State Department of Transportation |
| STBG | Surface Transportation Block Grant Program |
| STIP | Statewide Transportation Improvement Program |
| TAM | Transit Asset Management |
| TCM | Transportation Control Measure |
| TDM | Transportation Demand Management |
| TEA-21 | Trasportation Equite Act for the 21st Century |
| TFM | Travel Forecasting Model |
| TIP | Transportation Improvement Program |
| TMA | Transportation Management Area |
| TMIP | Travel Model Improvement Program |
| TOD | Transit Oriented Development |
| TPCB | Transportation Planning Capacity Building |
| TPM | Transportation Performance Management |
| TSMO | Transportation Systems Management and Operations |
| U.S.C. | U.S. Code |
| UPWP | Unified Planning Work Program |
| USDOT | United States Department of Transportation |
| UZA | Urbanized Area |
