The Mississippi Commission on Interstate Cooperation oversees and encourages the state's participation in interstate bodies, especially the Council of State Governments and the National Conference of State Legislatures. Mississippi also participates in the Appalachian Regional Commission, Arkansas-Mississippi Great River Bridge Construction Compact, Highway 82 Four Lane Construction Compact, Mississippi-Alabama Railroad Authority Compact, Gulf States Marine Fisheries Commission, Southeastern Forest Fire Protection Compact, Southern Growth Policies Board, Southern States Energy Board, Southern Regional Education Board, and Tennessee-Tombigbee Waterway Development Authority. Mississippi received over $4.2 billion in federal aid in 2001.