Data for Figure 1-3: Highway Bridge Condition: Michigan,,,,,,,
Year,Total # of Bridges,Structurally deficient  ,,Functionally obsolete,,Total of Both,

,,#,%,#,%,#,%
1996,"11,385","2,416",21,"1,570",14,"3,986",35
1997,"11,368","2,273",20,"1,599",14,"3,872",34
1998,"11,385","2,232",20,"1,614",14,"3,846",34
1999,"11,220","2,255",20,"1,532",14,"3,787",34
2000,"10,581","2,181",21,"1,336",13,"3,517",33
2001,"10,631","2,012",19,"1,354",13,"3,366",32
"SOURCE:  U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory: Deficient Bridges by State and Highway System, Washington, DC: 2001, available at http://www.fhwa.dot.gov/bridge/britab.htm as of Jan. 31, 2002.   ",,,,,,,

Data for Figure 1-3: Highway Bridge Condition: United States,,,,,,,
Year,Total # of Bridges,Structurally deficient  ,,Functionally obsolete,,Total of Both,
,,#,%,#,%,#,%
1996,"582,043","101,544",17,"81,217",14,"182,761",31
1997,"583,207","98,521",17,"77,466",13,"175,987",30
1998,"583,414","93,119",16,"79,567",14,"172,686",30
1999,"585,542","88,150",15,"81,900",14,"170,050",29
2000,"587,458","86,692",15,"80,889",14,"167,581",29
2001,"590,066","83,630",14,"81,469",14,"165,099",28
"SOURCE:  U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory: Deficient Bridges by State and Highway System, Washington, DC: 2001, available at http://www.fhwa.dot.gov/bridge/britab.htm as of Jan. 31, 2002.   ",,,,,,,