1. American Association of State Highway and Transportation Officials (AASHTO). AASHTO LRFD bridge design specifications, 3rd ed. Washington, DC; 2004.
2. American Association of State Highway and Transportation Officials (AASHTO). Manual for the Condition Evaluation and Load and Resistance Factor Rating (LRFR) of highway bridges, Washington, DC; 2003.
3. Quantifying field-test behavior for rating steel girder bridges;Barker;J Bridge Eng, ASCE,2001
4. Understanding capacity rating of bridges from load tests;Cai;Pract Period Struct Des Constr, ASCE,2005
5. Nondestructive evaluation of concrete infrastructure with ground penetrating radar;Maierhofer;J Mater Civil Eng, ASCE,2003