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Quantifying the Impact of I/D Contracting on the Time/Cost Trade-Off for Pavement Rehabilitation Projects

机译：量化I / D合同对路面修复项目的时间/成本权衡的影响

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The current deteriorating state of the highway system in the Unites States is shifting the balance of highway construction projects towards maintenance and rehabilitation works on the expense of new construction. Hence, state highway agencies (SHAs) are now challenged to complete a substantial scope of highway rehabilitation work while controlling and reducing the negative impacts on the travelling public. Therefore, alternative contracting methods that are aimed at reducing highway projects' durations, such as the incentive/disincentive (I/D) method, are gaining popularity among SHAs. For instance, the value of the ID assigned in a highway project has a significant effect on expediting the completion of the project while saving tax dollars. However, the current practice of estimating and assigning the ID value is not adequate and is frequently either overestimated or underestimated. This paper presents the development of a new model to accurately estimate ID value in highway rehabilitation projects based on the desired level of duration reduction. The model quantifies the impact of the I/D contracting method on the trade-off between time and cost of highway rehabilitation projects which should prove useful to SHAs in determining and assigning values of ID that are proper for the required project duration reduction together with the likelihood of achieving it.
机译：单位中的公路系统的当前恶化状态在于在新建的牺牲牺牲新建的维护和康复工作方面的平衡。因此，国家公路机构（SHA）现在挑战完成高速公路康复工作的大幅度范围，同时控制和减少对旅行公众的负面影响。因此，旨在减少公路项目持续时间的替代承包方法，例如激励/抑制（I / D）方法，在SHA中受到普及。例如，在高速公路项目中分配的ID的值对加速项目的完成产生了重大影响，同时节省税收。但是，估计和分配ID值的当前实践不足，并且经常高估或低估。本文提出了一种新型模型，以基于所需的持续时间水平准确地估计公路康复项目ID值。该模型量化了I / D收缩方法对公路康复项目的时间和成本之间的权衡，这应该证明在确定和分配适合所需项目持续时间的ID值以及实现它的可能性。

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