@BOOK{NAP22137, author = "Transportation Research Board and National Academies of Sciences, Engineering, and Medicine", editor = "Martin Wachs and Benton Heimsath", title = "Forecasting Transportation Revenue Sources: Survey of State Practices", doi = "10.17226/22137", abstract = "TRB\u2019s National Cooperative Highway Research Program (NCHRP) Synthesis 479: Forecasting Transportation Revenue Sources: Survey of State Practices documents current and proposed forecasting methodologies, as well as shortcomings of methods as reported by state departments of transportation (DOTs). The report also includes information about the types of revenue being forecasted, and how satisfied DOTs have been by the accuracy of their projections.", url = "https://nap.nationalacademies.org/catalog/22137/forecasting-transportation-revenue-sources-survey-of-state-practices", year = 2015, publisher = "The National Academies Press", address = "Washington, DC" }