1. American Society of Civil Engineers, 1998. Report Card for America’s Infrastructure (1998 Report Card). .
2. American Society of Civil Engineers, 2003. Report Card for America’s Infrastructure (2003 Report Card). .
3. American Society of Civil Engineers, 2005. Report Card for America’s Infrastructure (2005 Report Card). .
4. American Society of Civil Engineers, 2009a. Report Card for America’s Infrastructure (2009 Report Card). .
5. American Society of Civil Engineers, 2009b. America’s Infrastructure Crisis: Can we Come Back from the Brink? .