Strategies for Work Zone Transportation Management Plans (2020) / Chapter Skim
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Pages 133-158
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133 Contracting strategies refer to the contractual agreements used to accelerate construction completion of transportation projects. A contracting strategy is the combination of the delivery method, the procurement procedure, and the payment provision.
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134 Strategies for Work Zone Transportation Management Plans the design is often broken into packages or segments, allowing construction to begin on portions of the project while other elements are still being designed. 8.1.2 When to Use The D-B method is not suited for every project.
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Alternative Contracting and Construction Strategies 135 The results of an internal FDOT study conducted in March 2014 indicated that using the D-B approach to deliver a $55 million and 814-day project resulted in a cost savings of $6,457,345 and total time savings of 656 days compared with using DBB (https://www.fdot.gov/construction/ DesignBuild/DBGeneral/GeneralInfoMain.shtm)
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136 Strategies for Work Zone Transportation Management Plans 8.1.7 Design Features and Requirements Sufficient preliminary engineering (30 percent) needs to be performed before an agency can execute a D-B contract.
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Alternative Contracting and Construction Strategies 137 8.1.9 Cost D-B is a planning strategy and there is no separate cost for its implementation. The costs associated relate to in-house or consultant-staffing resources to develop and manage a project.
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138 Strategies for Work Zone Transportation Management Plans Using CDOT's PDSM as a foundation, WSDOT developed the PDMSG. The PDMSG is available at https://www.wsdot.wa.gov/construction-planning/project-delivery/method-selectionguidance.
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Alternative Contracting and Construction Strategies 139 8.2.5 Crash Modification Factor A CMF is not applicable; however, alternative contracting and construction strategies reduce construction time and impact to motorists and workers, which improves overall work zone safety. 8.2.6 Implementation Considerations The selection of the design firm is the initial step during the early stages of the project.
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140 Strategies for Work Zone Transportation Management Plans are not repeated here to avoid duplication. Instead, readers are requested to refer the following state web pages for more information on CM/GC case studies: • The CDOT Alternative Delivery Program web page (https://www.codot.gov/business/design support/adp-db-cmgc)
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Alternative Contracting and Construction Strategies 141 UDOT. Alternative Contracting Process: SEP-14 Construction Manager General Contractor.
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142 Strategies for Work Zone Transportation Management Plans 8.3.3 Benefits The use of A+B contracting provides the following benefits: • Reduces construction-induced congestion and delays. • Encourages bidders to develop more detailed and well thought out plans.
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Alternative Contracting and Construction Strategies 143 cost items, but in return would reduce the impact on overall traffic control cost. However, a bidding firm would not likely bid the shorter duration, as savings associated with traffic control are not shared with the firm.
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144 Strategies for Work Zone Transportation Management Plans specified time or for failing to achieve set goals. Contracts may pair these two provisions in an incentive/disincentive (I/D)
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Alternative Contracting and Construction Strategies 145 Figure 8.1. Flowchart of systematic procedures for determination of I/D dollar amount.
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146 Strategies for Work Zone Transportation Management Plans 8.4.4 Expected Effectiveness Sun, Edara, and Mackley (2012) examined the effectiveness of 20 MoDOT I/D contracts from 2008 to 2011 and evaluated the extent to which they mitigated work zone traffic effects.
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Alternative Contracting and Construction Strategies 147 8.4.9 Cost I/D is a planning strategy and there is no separate cost for its implementation. The costs associated relate to in-house or consultant-staffing resources to develop and manage a project.
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148 Strategies for Work Zone Transportation Management Plans • Improves worker safety. • Reduces road-user delay costs.
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Alternative Contracting and Construction Strategies 149 8.5.10 Resources and References AASHTO. No Excuse Incentive Provisions Survey, AASHTO Subcommittee on Construction, Contract Administration Section, Washington, D.C., May 2010.
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150 Strategies for Work Zone Transportation Management Plans 8.6.4 Expected Effectiveness According to the MDOT Innovative Construction Contracting Guide (2015) , lane-rental provisions encourage contractors to set work schedules that keep lane closures to a minimum.
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Alternative Contracting and Construction Strategies 151 from the contract lane-rental lump sum bid by the contractor the total lane-rental assessments, which cannot exceed the maximum. For example, if a contractor bids $1 million (lump sum)
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152 Strategies for Work Zone Transportation Management Plans 8.7.3 Benefits A VE program provides a definitive tool to improve value in any project, product, or process. Cost savings, reduced risk, improved schedule, enhanced design, and quality have been common outcomes of VE studies.
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Alternative Contracting and Construction Strategies 153 Project Name VE Study Construction Cost VE Study Savings Associated Costs Project Savings Sac 5 HOV Lanes and Rehab Improvement: Combined two nearby projects and adjusted work windows to allow for precast slab replacement $168,000,000 $1,534,000 $72,000 $1,462,000 Sac 5 HOV Lanes and Rehab Project combined with the previous project $165,000,000 $2,751,000 $52,000 $2,699,000 Mon 101 Pavement Rehab, PM 36.9 to 47.7 Improvement: Increased ramp closures to allow for pavement curing in lieu of precast slabs $49,800,000 $ 6,445,000 $42,000 $6,403,000 Mon 101 Seismic Retrofit The results of the geotechnical studies eliminated the need for cast-in-steel-shell piles. Another alternative was eliminated after a project scope reduction.
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154 Strategies for Work Zone Transportation Management Plans It is important to hold the VE study early enough during the project-development phase to incorporate acceptable VE recommendations. The letting may be delayed if there is not enough time to incorporate recommendations into the plans.
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Alternative Contracting and Construction Strategies 155 The use of prefabricated bridge elements and systems (PBES) and SPMTs are typical in ABC projects.
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156 Strategies for Work Zone Transportation Management Plans Figure 8.2. Flowchart for high-level decision on whether a prefabricated bridge should be used in a certain project (Credit: FHWA)
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Alternative Contracting and Construction Strategies 157 Projects web page (https://www.fhwa.dot.gov/hfl/projects/) provides a list of projects constructed using the ABC technique.
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158 Strategies for Work Zone Transportation Management Plans In 2013, RITA (under U.S.
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