Glossary List

CAC - Citizens Advisory Committee - The main standing body providing citizen input into the deliberations of the Transportation Planning Board (TPB).
CLRP - Financially Constrained Long Range Transportation Plan - Developed and approved by the TPB, the CLRP is a regional plan that includes all transportation projects and programs that the TPB realistically anticipates can be implemented over the next 25 years. In order to receive federal funding, transportation projects must be included in the CLRP and the TIP.
DDOT - District of Columbia Department of Transportation - DDOT acts as a state department of transportation for the District of Columbia. It serves as a multi-modal transportation department and also acts as a city department with responsibility for local streets and roads.
EIS - Environmental Impact Statement - An EIS is a comprehensive study required by the National Environmental Policy Act (NEPA) before certain types of major transportation projects may proceed.
FHWA - Federal Highway Administration - Within the US Department of Transportation, FHWA is responsible for highway issues, including federal laws and regulations related to metropolitan transportation planning.
FTA - Federal Transit Administration - Within the US Department of Transportation, FTA is responsible for public transit issues, including federal laws and regulations related to metropolitan transportation planning.
ISTEA - Intermodal Surface Transportation Efficiency Act of 1991 - Commonly called "Ice Tea," this 1991 law made broad changes in the way transportation decisions are made, emphasizing balance of transportation modes, strengthening public involvement and giving more power to metropolitan planning organizations including the TPB.
MDOT - Maryland Department of Transportation - Maryland's state DOT serves an umbrella encompassing all the state-level transportation agencies, including the Maryland Transit Administration and the State Highway Administration.
MPO - Metropolitan Planning Organization - Federal transportation laws and regulations require the establishment of an MPO in every urbanized area of the U.S. with a population over 50,000. MPOs are responsible for meeting the federal metropolitan planning regulations for transportation. The TPB is one of 341 MPOs across the nation.
MSHA - Maryland State Highway Administration - SHA is MDOT's highway division. It is primarily responsible for planing, designing, building and maintaining Maryland's interstate and state roads.
MTA - Maryland Transit Administration - MTA is the public transit arm of MDOT. Among other things, MTA operates and maintains the Maryland Rail Commuter (MARC) trains. MTA also operates commuter buses and provides funding and support to WMATA.
MWAA - Metropolitan Washington Airports Authority - The Metropolitan Washington Airports Authority plans and manages all the facilities at the Reagan National Airport and Dulles International Airport. The authority's oversight includes ground access to the airport.
MWAQC - Metropolitan Washington Air Quality Committee - MWAQC is the entity certified under the Federal Clean Air Act to prepare an air quality plan for the Washington region. Like the TPB, MWAQC is housed at the Council of Governments.
NCPC - National Capital Planning Commission - NCPC is a federal agency that provides overall planning guidance for federal land and buildings, and related transportation issues, throughout the national capital region.
NVTA - Northern Virginia Transportation Authority - Created in 2002, the Northern Virginia Transportation Authority is charged with developing a transportation plan for Northern Virginia, working with Northern Virginia's communities to develop regional priorities and policies to improve air quality, and serving as an advocate for the transportation needs of Northern Virginia before the state and federal governments.
NVTC - Northern Virginia Transportation Commission - In additional to being a co-owner of the VRE, the NVTC coordinates public transit policies within Northern Virginia and appoints Virginia's representatives to the WMATA board. NVTC serves Arlington, Fairfax and Loudoun counties and the cities of Alexandria, Fairfax, and Falls Church.
PRTC - Potomac and Rappahannock Transportation Commission - PRTC operates local transit in Prince William and Stafford counties and the cities of Fredericksburg, Manassas and Manassas Park. PRTC is a co-owner of the VRE along with NVTC.
RTPP - Regional Transportation Priorities Plan - The purpose of the RTPP is to identify those transportation strategies that best promote the TPB’s goals for economic opportunity, transportation choices, system safety and efficiency, quality of life, and environmental stewardship. The RTPP will identify 10 to 15 strategies that the region agrees are the top priorities for addressing the most pressing challenges that the region faces in meeting our shared goals.
SIP - State Implementation Plan (air quality) - The federal Clean Air Act requires states to produce State Implementation Plans for the attainment of air quality standards. For simplicity's sake, the Washington region's air quality plan is often called a SIP, but technically the regional air quality plan comprises the region's portions of three SIPs - for Virginia, Maryland and the District of Columbia.
TEA-21 - Transportation Equity Act for the 21st Century - TEA-21 is the legislation that reauthorized the federal reauthorization programs in 1998. TEA-21 retained and expanded most of the programs of ISTEA, in addition to greatly increasing overall funding for transportation. It will expire in 2003.
TERMs - Transportation Emissions Reductions Measures - TERMs are transportation measures which are considered - and sometimes implemented - by the TPB to help meet the region's air quality goals. They can include things like ridesharing and telecommuting programs, improved transit and bicycling facilities, and clean fuel vehicle programs.
TIP - Transportation Improvement Program - Developed and approved by the TPB, the TIP is a list of projects and programs that will be implemented over the next six years. In order to receive federal funding, transportation projects must be included in the CLRP and the TIP.
TPB - National Capital Region Transportation Planning Board - The TPB is the organization that brings together key decision makers to coordinate planning and funding for the region's transportation system. TPB members include local officials, representatives of state transportation agencies, The Washington Metropolitan Area Transit Authority, state legislators, and others. The TPB is designated as a Metropolitan Planning Organization (MPO) and is therefore responsible for meeting federal metropolitan planning requirements for transportation. The TPB is staffed by the Council of Governments.
US DOT - U.S. Department of Transportation - USDOT is the cabinet-level federal department responsible for federal transportation laws and regulations. It includes the FHWA and FTA, two agencies that are directly involved in the MPO process and therefore, with the TPB.
US EPA - U.S. Environmental Protection Agency - EPA is the federal agency responsible for federal environmental laws and regulations. EPA plays a central role in implementing the federal Clean Air Act, which deeply affects the metropolitan transportation planning process.
VDOT - Virginia Department of Transportation - VDOT is a state DOT notable for its unusually far-reaching authority over public roads. It has the third largest state-maintained highway system in the country. VDOT is separate from the Virginia Department of Rail and Public Transportation (VDRPT).
VDRPT - Virginia Department of Rail and Public Transportation - VDRPT, an agency under the Virginia Secretary of Transportation (as is VDOT) provides technical and financial assistance to Virginia's public transit.
WMATA - Washington Metropolitan Area Transit Authority - Created in 1967, WMATA is the public transit agency that runs the Metro bus and rail systems. Its board included elected and appointed officials from throughout the system's service area.