1. American Association of State Highway Transportation Officials (AASHTO) (2010) Highway safety manual. American Association of State Highway Transportation Officials (AASHTO)
2. American Association of State Highway Transportation Officials (AASHTO) (2020) Welcome to AASHTOWare project. https://www.aashtowareproject.org/
3. American Road and Transportation Builders Association (ATBA) (2020) Work zone fatal crashes and fatalities. The National Work Zone Safety Information Clearing House. https://www.workzonesafety.org/crash-information/work-zone-fatal-crashes-fatalities/
4. California Department of Transportation (Caltrans) (2013) Life-cycle cost analysis procedures manual. https://dot.ca.gov/-/media/dot-media/programs/maintenance/documents/office-of-concrete-pavement/life-cycle-cost-analysis/lcca-25ca-manual-final-aug-1-2013-v2-a11y.pdf
5. Chui MK, McFarland WF (1986) The value of travel time: new estimates developed using a speed-choice model. FHWA/TX-86/33+396-2F. Texas State Department of Highways and Public Transportation