INTRODUCTION

The National Highway System (NHS) Designation Act of 1995 required state DOTs to conduct a life-cycle cost analysis on NHS projects costing $25 million or more. The 1998 Transportation Equity Act for the 21st Century (TEA-21) removed the requirement for LCCA on high cost NHS projects. However, the Federal Highway Administration (FHWA) still recommends LCCA and has a policy statement recommending the use of good practice, rather than specifying a single LCCA method.
One of the most comprehensive tools for LCCA is Publication No. FHWA-SA-98- 079, Life-Cycle Cost Analysis in Pavement Design. The FHWA publication recommends procedures for conducting LCCA of pavements using Monte Carlo simulation procedures to account for the uncertainties associated with LCCA inputs.

The final results from any LCCA procedure, regardless of sophistication, is no better than the input variables. To that end, the purpose of this study was to evaluate the historical expenditures for rural interstate pavements in Kansas and to provide historical performance and cost data to evaluate the assumptions associated with LCCA input parameters currently used in Kansas.


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