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Impact Of Life-Cycle Costs Threshold Criteria In The Alternate Design Pavement Bidding Practices Of Public Transportation Agencies, Ilker Karaca, Douglas Gransberg, Ashley F. Buss

Ilker Karaca

This paper proposes a model that enables Department of Transportation (DOT) policy makers to quantify the expected volume of projects that will qualify for letting in their alternate design/alternate bid (ADAB) pavement bidding programs. Current guidance on alternate bidding recommends a fixed percentage as the life cycle cost (LCC) threshold criterion to determine whether pavement selection decisions should be made through ADAB bidding practices. The paper’s analysis shows that the fixed LCC threshold percentage approach may have considerable shortcomings. Instead, a dynamic threshold value is proposed that can subsequently be calibrated by agencies, based on the desired size of their …