Estimating Highway Preconstruction Services Costs - Volume 2: Research Report

Gransberg, Douglas D.; Jeong, Hae‐Kwon; Craigie, Emily K.; Rueda-Benavides, Jorge A.; Shrestha, Kishor

doi:10.17226/23627

Cited by 1 publication

(1 citation statement)

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“…However, A+B combined with I/D provisions is known to increase costs for both agencies and contractors, but agencies benefit from construction time saved for road users and the contractors benefit from incentive bonuses (Anderson and Damnjanovic 2008;Choi et al 2016;Fick et al 2010;Gransberg et al 2016).…”

Section: Backgroundsmentioning

confidence: 99%

ACT²: Time–Cost Tradeoffs from Alternative Contracting Methods

et al. 2021

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Incentive/disincentive (I/D) and cost-plus-time (A+B) are the two most widely used alternative contracting methods (ACMs) for accelerating the construction of highway infrastructure improvement projects. However, little is known about their tradeoff effects on project schedule and cost performance. This study addresses this problem by creating and testing a stochastic decision support model called alternative contracting cost-time tradeoff (ACT 2 ). This method was developed by a second order polynomial regression analysis and validated by the PRESS statistic and paired comparison tests. The results of a trend analysis based on a rich set of high-confidence project data show that I/D was effective at cutting the duration of projects, while I/D produced the largest cost growth as compared to pure A+B and conventional methods. This cost-time tradeoff effect was confirmed by the ACT 2 model, which determines the level of the cost-time tradeoff effect for different ACMs. This study will help state transportation agencies promote more effective application of ACMs by providing data-driven performance benchmarking results for ACMs when evaluating competing accelerating strategies and techniques.

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Section: Backgroundsmentioning

confidence: 99%