1. Colorado DOT. 2016. CDOT Asset Valuation Report. Business Services Branch Division of Accounting and Finance, Colorado DOT.
2. Connecticut DOT. 2019. Highway Transportation Asset Management Plan. Connecticut DOT.
3. Ebeling, C. E. 1997. An Introduction to Reliability and Maintainability Engineering. New York, NY, USA: McGraw-Hill.
4. FHWA & ITE. 2019. Traffic Signal Benchmarking and State of the Practice Report. National Operations Center of Excellence and Institute of Transportation Engineers.
5. FHWA. 2017. Asset Management Plans, 23 CFR Part 515. Washington, DC.: FHWA.