- Allegany County Emergency Services and Communications
- Allegany County Office of the Sheriff
- Allegany County Public Works Division
- Allegany County Transit
- Anne Arundel County Department of Emergency Management
- Anne Arundel County Department of Public Works
- Anne Arundel County Fire Department
- Baltimore City Department of Transportation
- Baltimore City Fire Department
- Baltimore City Police Department
- Baltimore County 911 Central Communications Center
- Baltimore County Department of Aging
- Baltimore County Department of Public Works
- Baltimore County Fire Department
- Baltimore County Police Department
- Baltimore Metropolitan Council
- CapWIN Board of Directors
- Calvert County Department of Public Works
- Calvert County Department of Transportation
- Calvert County Public Safety Department
- Caroline County Department of Public Works
- Caroline County Department of Emergency Services
- Caroline County Sheriff’s Office
- Carroll County Office of Public Safety
- Carroll County Department of Public Works
- Cecil County Department of Public Works
- Cecil County Department of Emergency Services
- Cecil County Office of the Sheriff
- Charles County Sheriff’s Office
- Charles County Department of Community Services
- Charles County Department of Public Facilities
- Charles County Department of Emergency Services
- City of Annapolis Department of Public Works
- City of Annapolis Office of Emergency Management
- City of Annapolis Transportation Department
- City of Rockville Department of Public Works
- Cumberland Metropolitan Planning Organization
- Delaware Department of Transportation
- District Department of Transportation (Washington, C.)
- Dorchester County Department of Public Safety
- Dorchester County Department of Land Use and Environment
- Redskins Stadium Operations
- Federal Highway Administration
- Frederick County Citizen Services Division
- Frederick County Division of Public Works
- Frederick County Division of Fire and Rescue Services
- Frederick County Sheriff’s Office
- Garrett County Office of Emergency Management
- Garrett County Sheriff’s Office
- Garrett County Roads Department
- Hagerstown Metropolitan Planning Organization
- Harford County 911 Operations Center
- Harford County Department of Public Works
- Harford County Emergency Operations Center
- Harford County Transportation Services
- Howard County Department of Fire and Rescue
- Howard County Department of Public Works
- Howard County Police Department
- Howard County Sheriff’s Office
- Howard Transit
- Hyattsville Department of Public Works
- I-95 Corridor Coalition
- Kent County Department of Public Works
- Kent County Sheriff’s Office
- Kent County Emergency Management Agency
- Ravens Stadium Operations
- Local Traffic Management Agencies
- Maryland Aviation Administration
- Maryland Department of the Environment
- Maryland Department of Transportation (MDOT)
- Maryland Department of Transportation Office of Motor Carrier Safety
- Maryland Emergency Management Agency
- Maryland Port Administration
- Maryland State Highway Administration – CHART
- Maryland State Highway Administration Office of Traffic and Safety
- Maryland State Highway Administration – Signals
- Maryland State Police
- Maryland Transit Administration
- Maryland Transportation Authority
- Metropolitan Washington Airport Authority
- Metropolitan Washington Council of Governments
- Maryland Emergency Management Agency
- Maryland Institute Emergency Management Services
- Montgomery County Fire and Rescue Service
- Montgomery County Department of Park and Planning
- Montgomery County Department of Police
- Montgomery County Department of Transportation
- Motor Vehicle Administration
- Port of Baltimore
- Prince George’s County Department of Public Works and Transportation
- Prince George’s County Fire/EMS Department
- Prince George’s County Office of Homeland Security
- Prince George’s County Police Department
- Private Sector Traveler Information and Transportation Service Companies
- Queen Anne’s County Department of Emergency Services
- Queen Anne’s County Department of Public Works
- Queen Anne’s County Sheriff’s Department
- Saint Mary’s County Department of Public Safety
- Saint Mary’s County Department of Public Works and Transportation
- Saint Mary’s County Sheriff’s Office
- Saint Mary’s Transit System
- Somerset County Department of Land Use and Environment
- Somerset County Department of Public Safety
- Tri-County Council for Southern Maryland
- Tri-County Council for Western Maryland
- Talbot County Department of Public Safety
- Talbot County Department of Public Works
- Tri-County Council for Southern Maryland
- Town of Ocean City Transportation
- University of Maryland Center for Advanced Transportation Technology
- Virginia Department of Transportation
- Virginia State Police
- Washington County Department of Emergency Services
- Washington County Department of Public Works
- Washington County Sheriff’s Office
- Wicomico County Department of Emergency Services
- Wicomico County Department of Public Works
- Wicomico County Sheriff’s Office
- Wilmington Metropolitan Area Planning Organization
- Washington Metropolitan Area Transit Authority
View the 2009 Maryland ITS Architecture by Element/Facility Relationship