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Iowa State University--Becoming the Best

Development of a Method to Determine Pavement Damage Due to Detours (TR-470)


Principal investigators:

Co-principal investigator:

Project status


Start date: 04/01/02
End date: 03/03/04


Report: Development of a Method to Determine Pavement Damage Due to Detours (TR-470) (283 kb pdf) April 2005


Sponsor(s): Iowa Highway Research Board

About the research

Abstract: The research presented in this report provides the basis for the development of a new procedure to be used by the Iowa DOT and cities and counties in the state to deal with detours. Even though the project initially focused on investigating new tools to determine condition and compensation, the focus was shifted to traffic and the gas tax method to set the basis for the new procedure. It was concluded that the condition-based approach, even though accurate and consistent condition evaluations can be achieved, is not feasible or cost effective because of the current practices of data collection (two-year cycle) and also the logistics of the procedure (before and after determination).

The gas tax method provides for a simple, easy to implement, and consistent approach to dealing with compensation for use of detours. It removes the subjectivity out of the current procedures and provides for a more realistic (traffic based) approach to the compensation determination.