References

Highways of the Future—A Strategic Plan for Highway Infrastructure Research and Development. (n.d.). Retrieved November 22, 2015, from http://www.fhwa.dot.gov/publications/research/infrastructure/structures/08068/index.cfm

Yahoo Search – Web Search. (n.d.). Retrieved November 22, 2015, from https://search.yahoo.com/search?ei=utf-8&fr=slv1-&p=bridge collapse photos&type=

Bridges  C. (n.d.). Retrieved November 22, 2015, from http://www.infrastructurereportcard.org/bridges/ Office of Infrastructure R&D. (n.d.). Retrieved November 22, 2015, from http://www.fhwa.dot.gov/publications/research/infrastructure/12059/index.cfm

FHWA Kicks Off National Work Zone Awareness Week — Occupational Health & Safety. (n.d.). Retrieved November 22, 2015, from https://ohsonline.com/

http://www.fhwa.dot.gov/publications/research/infrastructure/structures/08068/index.cfm
http://www.governing.com/topics/transportation-infrastructure/six-ideas-for-fixing-the-nations-infrastructure-problems.html
http://www.cpr.ca.gov/CPR_Report/Issues_and_Recommendations/Chapter_4_Infrastructure/INF20.html
http://www.fhwa.dot.gov/infrastructure/
https://search.yahoo.com/search?ei=utf-8&fr=slv1-&p=bridge%20collapse%20photos&type=
http://www.infrastructurereportcard.org/bridges/
http://www.fhwa.dot.gov/publications/research/infrastructure/12059/index.cfm
https://ohsonline.com/articles/2015/03/25/fhwa-kicks-off-national-work-zone-awareness-week.aspx