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Title Use of incentive/disincentive contracting to mitigate work zone traffic impacts
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Date Accessioned
University/Publisher University of Missouri – Columbia
Abstract [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Incentive/disincentive clauses (I/D) are designed to award payments to contractors if they complete work ahead of schedule and to deduct payments if they exceed the completion time. A previously unanswered question is, "Did the costs of the actual work zone impacts that were avoided justify the incentives paid?" This paper answers that question affirmatively based on an evaluation of 20 I/D projects in Missouri from 2008 to 2011. Road user costs (RUC) were used to quantify work zone impacts and included travel delays, vehicle operating costs, and crash costs. These were computed using work zone traffic conditions for partial‐closure projects and detour volumes and routes for full‐closure projects. Conditions during construction were compared to after construction. Crash costs were computed using Highway Safety Manual methodology. Safety Performance Functions produced annual crash frequencies that were translated into crash cost savings. In considering an average project, the percentage of RUC savings was around 13% of the total contract amount, or $444,389 of $3,464,620. I/D provisions were very successful in saving RUC for projects with full-closure, projects in urban areas, and emergency projects. Rural, non-emergency projects successfully saved RUC but not at the same level as other projects. The I/D contracts were also compared to all Missouri Department of Transportation contracts for the same time period. The results show that I/D projects had a higher on-time completion percentage and a higher number of bids per call than average projects. But I/D projects resulted in 4.52% higher deviation from the project budget and possibly more changes made after the award. A survey of state transportation departments and contractors showed that both agreed to the same issues that contribute to the success of I/D contracts. Overall, in terms of work zone impact mitigation, I/D contracts are very beneficial at a relatively low cost.
Subjects/Keywords work zone impact; road user costs; road construction; contractor incentives
Contributors Sun, Carlos (advisor); Edara, Praveen K. (Praveen Kumar) (advisor)
Language en
Rights Access is limited to the campuses of the University of Missouri.
Country of Publication us
Record ID handle:10355/33248
Repository missouri
Date Retrieved
Date Indexed 2020-12-10
Issued Date 2012-01-01 00:00:00
Note [] Title from PDF of title page (University of Missouri – Columbia, viewed on March 19, 2013).; [] The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical general description, or public abstract, appears in the public.pdf file.; [] Thesis advisors: Dr. Carlos Sun and Dr. Praveen Edara; [] Includes bibliographical references.; [] M.S. University of Missouri-Columbia 2012.; [] "December 2012";

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