Highways
- Federal Highway Administration
- Maryland Department of Transportation
Maryland State Highway Administration (Local District 6) - West Virginia Department of Transportation
- West Virginia Division of Highways (Local District 5)
- Pennsylvania Department of Transportation
Transit
- Federal Transit Administration
- Maryland Transit Administration
- West Virginia Division of Public Transit
- Washington County Transit
- Eastern Panhandle Transit Authority
Local Agencies
- Washington County Government
- City of Hagerstown Government
- Berkeley County Government
- City of Martinsburg Government
- Jefferson County Government
- West Virginia Region 9 Planning and Development Council
Air Quality
- Environmental Protection Agency
- Maryland Department of the Environment
- West Virginia Department of Environmental Protection
