Maryland Regional Planning Organizations: MPOs, COGs, and Intergovernmental Bodies

Maryland's regional planning landscape is structured through a layered network of metropolitan planning organizations (MPOs), councils of governments (COGs), and intergovernmental bodies that coordinate transportation, land use, environmental management, and public services across county and municipal boundaries. These entities operate under federal and state mandates, with distinct authorities, funding relationships, and membership structures. Understanding which body holds jurisdiction over a given geographic area or functional domain is essential for developers, transportation engineers, local government officials, and policy researchers navigating project approvals and funding eligibility.

Definition and scope

Metropolitan Planning Organizations (MPOs) are federally designated bodies required under 23 U.S.C. § 134 and 49 U.S.C. § 5303 for urbanized areas with populations exceeding 50,000. MPOs hold statutory responsibility for developing long-range transportation plans and transportation improvement programs (TIPs) for their designated urbanized areas. Federal transportation funding to a region is conditioned on MPO approval of conforming projects. In Maryland, MPOs function as a required gateway for federal surface transportation funds administered through the Federal Highway Administration (FHWA) and the Federal Transit Administration (FTA).

Councils of Governments (COGs) are voluntary intergovernmental associations created under Maryland Code, Article 24 (Local Government Article). COGs have broader mandates than MPOs, addressing regional coordination across planning, environmental quality, public safety, housing, and economic development. COG membership typically includes county governments, municipalities, and state agency representatives. COGs are not federal mandates but fulfill an advisory, coordinating, and grant-administration role across a geographic region. For broader context on how these bodies fit within the state's governmental hierarchy, see Maryland Local Government Structure.

Intergovernmental bodies encompass a wider category including bi-state compacts, watershed authorities, and special-purpose regional agencies. These may be created by interstate compact, state statute, or memoranda of understanding between jurisdictions, and their authority varies accordingly.

Scope and coverage: This page addresses regional planning bodies operating within or substantially within Maryland's geographic boundaries. Bodies created by interstate compact that are headquartered outside Maryland — such as the Washington Metropolitan Area Transit Authority (WMATA), governed by the WMATA Compact of 1966 — have their own enabling instruments and are referenced here only for structural context. Federal agency planning functions, tribal government planning, and purely local comprehensive planning by individual counties or municipalities are not covered by this page.

How it works

Maryland's regional planning system functions through 4 principal MPOs and 2 major COGs operating across the state's 24 jurisdictions (23 counties plus Baltimore City).

The major bodies and their geographic coverage:

  1. Baltimore Regional Transportation Board (BRTB) — The MPO for the Baltimore urbanized area, convened under the Baltimore Metropolitan Council (BMC). BRTB covers Baltimore City, Anne Arundel County, Baltimore County, Carroll County, Harford County, and Howard County. BMC also functions as the COG for this region, providing a unified organizational structure where the MPO sits within the broader COG framework.

  2. National Capital Region Transportation Planning Board (TPB) — The MPO for the Washington, D.C. urbanized area, operated by the Metropolitan Washington Council of Governments (MWCOG). Maryland members include Montgomery County and Prince George's County. TPB is one of the largest MPOs by population in the United States, covering a multi-state region subject to both Maryland and Virginia state planning requirements.

  3. Hagerstown/Eastern Panhandle MPO — Covers the Hagerstown urbanized area, including Washington County and portions of adjacent West Virginia counties. This is a bi-state MPO operating under a joint agreement.

  4. Salisbury-Wicomico MPO — Covers the Salisbury urbanized area in Wicomico County on Maryland's Eastern Shore.

Federal law requires each MPO to produce a Unified Planning Work Program (UPWP), a Long-Range Transportation Plan (LRTP) covering a minimum 20-year horizon, and a Transportation Improvement Program (TIP) covering a 4-year funding cycle. All three documents must be kept current and fiscally constrained to federal funding projections.

MPO policy boards are composed of elected officials and agency representatives. Voting membership structures differ by body — BRTB's policy board operates under bylaws that weight votes by jurisdiction, while MWCOG's TPB uses a formula established in its charter.

Common scenarios

Transportation project programming: A county government seeking federal Surface Transportation Program (STP) funds for a road widening project in Baltimore County must submit the project to BRTB for inclusion in the TIP. Without TIP inclusion and MPO endorsement, the project cannot receive FHWA funds regardless of state-level support.

Regional land use coordination: Montgomery County development proposals with cross-border traffic implications for Prince George's County are frequently reviewed within the MWCOG framework, enabling coordinated analysis under Maryland's planning statutes before local approvals are finalized.

Environmental and watershed planning: The Chesapeake Bay watershed spans multiple COG regions. The Maryland Department of the Environment coordinates with both BMC and MWCOG on nutrient reduction planning tied to federal Bay TMDL (Total Maximum Daily Load) requirements established by the U.S. Environmental Protection Agency. Regional planning bodies feed county-level data into these state submissions. For dedicated coverage of this topic, see Chesapeake Bay Governance.

Transportation conformity: In air quality non-attainment areas — portions of the Baltimore and Washington regions designated as non-attainment under the Clean Air Act for ground-level ozone — MPOs must demonstrate that their LRTPs and TIPs conform to state implementation plans (SIPs) before federal approval. FHWA and FTA jointly make conformity determinations in coordination with the U.S. EPA.

Decision boundaries

The distinction between MPO and COG authority determines which body controls a given decision:

Decision Type Controlling Body Basis
Federal transportation fund programming MPO (BRTB or TPB) 23 U.S.C. § 134
Long-range transportation plan adoption MPO Federal planning regulations (23 CFR Part 450)
Regional housing and land use coordination COG (BMC or MWCOG) Voluntary agreement; Maryland Local Government Article
Air quality conformity determination MPO + FHWA/FTA/EPA 40 CFR Part 93
Watershed planning coordination COG + MDE State statute and Bay TMDL framework

A critical boundary exists between MPO authority and state DOT authority. The Maryland Department of Transportation (MDOT) controls the State Transportation Improvement Program (STIP), which must be consistent with but is not subordinate to individual MPO TIPs. MDOT's Statewide Transportation Plan provides the overarching policy framework within which MPO plans must conform.

Projects located entirely outside an urbanized area — including rural road improvements in Garrett County or Caroline County — fall under MDOT and local jurisdiction without MPO involvement, though they may still be coordinated through regional bodies under COG auspices.

The Baltimore-Washington metropolitan area is unique in that it is bisected by two separate MPOs (BRTB and TPB), meaning that a transportation corridor spanning both regions must navigate the programming processes of both bodies. No single MPO holds jurisdiction over the full corridor in that case.

For the broader structural context governing these regional bodies within Maryland's governmental framework, the Maryland Government Authority index provides a reference overview of how state, regional, and local authority is distributed across Maryland's public sector.

References

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