1. American Society of Civil Engineers, Infrastructure Report Card. ASCE’s 2017 Infrastructure Report Card. (ASCE, 2017). https://www.infrastructurereportcard.org/catitem/roads/. Accessed 21 July 2019.
2. TRIP, The Interstate Highway System Turns 60: Challenges to Its Ability to Continue to Save Lives, Time and Money. (TRIP, 2016). http://www.tripnet.org/docs/Interstate_Highway_System_TRIP_Report_June_2016.pdf. Accessed 23 July 2019.
3. TRIP, National Fact Sheet. (TRIP, 2019). http://www.tripnet.org/docs/Fact_Sheet_National.pdf. Accessed 23 July 2019.
4. U.S. Department of Transportation, 2015 Status of the Nation’s Highways, Bridges and Transit: Conditions and Performance. (Federal Highway Administration/Department of Transportation, 2015). https://www.fhwa.dot.gov/policy/2015cpr/pdfs.cfm. Accessed 23 July 2019.
5. R. Justo-Silva, A. Ferreira, Pavement Maintenance considering Traffic Accident Costs, Inter. J. Pavement Res. Technol. 12 (6) (2019) 562–73. https://doi.org/10.1007/s42947-019-0067-3