Implementing Alternative Technical Concepts in All Types of Highway Project Delivery Methods (2020) / Chapter Skim
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16 Chapter 4 Research Outcomes This chapter will provide an overview of the important outcomes of the Phase 2 research that led to the determination of what information was put in the Guidebook. The focus of Phase 2 was to identify and document ATC effective practices at both the program and project-level.
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17 3. Enhance quality – 6 of 10 4.
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18 Table 4.3 displays the combined results and shows that the top five factors are unchanged. However, the order of the lower factors does vary a bit.
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19 Table 4.4. Common ATC Practices.
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20 that are not estimated to reduce the cost by a given amount will not be entertained. This is an effort to reduce the required resources for reviewing and approving ATCs and intersects with the point made in the previous paragraph regarding limiting the number of ATCs due to resource constraints.
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21 Table 4.5 Caltrans ATC Program Example (Adapted from Tritt 2013)
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22 proposals for the projects shown in Table 4.5. The stipend represents 0.29% of the contract amount.
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23 Table 4.6(cont.) Caltrans Devore Interchange DB Project ATC Summary Designbuilder ATC # Description Proposed Savings Decision Approved Conditionally Approved Not Approved Not an ATC: can be used C 1 Extended Ramp Closures $1,500,000 X 2 Extended Closure of Mainline Lanes $3,500,000 X 3 Use of precast girders $2,300,000 X 4 Use of precast girders - Kimbark Canyon Bridge $4,200,000 X 5 55-hour closures $600,000 X 6 Northbound I-15 connector extended lane closure $750,000 X 7 Use of HMA Type for base $5,255,000 X 8 Relocate Kenwood Avenue Braid $25,000,000 X 9 2-lane exit to a 1-lane exit $6,800,000 X 10 Change location of future managed lane corridor $12,000,000 X 11 Spread footings in lieu of pile foundations $1,500,000 X 12 Eliminate Debris Basin $3,500,000 X 13 Use of permanent steel deck forms $700,000 X 14 Use of stained concrete in lieu of Sculpted Rock Shotcrete Texture $825,000 X Total $56,430,000 D 1 Proposed Spread Footings $6,501,000 X 2 Precast Concrete Girders $11,000,000 X 3 Long-term closure of Kenwood Avenue onramp No costs provided X 4 Long-term closure of Kenwood Avenue offramp No costs provided X 5 Location and Layout Changes to Bridges $5,000,000 X 6 Replace cut and fill with retaining walls $4,000,000 X 7 I-15 SB Mainline extended lane closure (weekday)
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24 4.2.2 Georgia DOT The Georgia DOT case was focused on the programmatic use of ATCs with a P3 project. The agency is currently involved in the early stages of an $11.3 billion Major Mobility Improvement Program (MMIP)
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25 Figure 4.1 GDOT ATC Process Flow Chart. On P3 projects, the developer is brought into the project at an earlier point in development than in a standard DB project.
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26 • Provide sufficient time for proposers to develop and refine their ATCs • Ensure any and all "conditions" of approved individual ATCs are incorporated into executed contract • Assign dedicated staff for review of ATCs • Require proposers to specify clearly approved individual ATCs that have been incorporated in their proposals • Allow more time for negotiations with best-value proposer after selection and before finalization of contract documents • Define how to handle difference in cost savings between what the non-selected proposers ATC provided versus what the best-value proposer offered during negotiations • Consider right of way impacts resulting from ATCs either as increase or reduction in required right of way (VanMeter 2012)
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27 • Contractors become more familiar with a project's technical challenges earlier and can use the ATC process to mitigate or eliminate potentially costly risks. • Provides the ability to reduce a specific project's costs or completion time, and the ability to implement any developed alternative system wide for other applicable projects.
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28 Figure 4.2 Missouri DOT DBB Full Scope ATC Process Flow Chart Missouri DOT Design-Bid-Build ATC Process Pre-Advertising Conceptual Evaluation Approved Pr oj ec t D ev el op m en t a nd D el iv er y Ph as e Upcoming Project Evaluate for ATC Potential Advertise without ATCs Full or Limited ATC Scope? MoDOT Announce Intent to Include ATCs Contractor ATC Info Meeting Develop ATC Evaluation Process Develop ATC Scope Limitations Allowable ATC Scope Clause Full Scope ATC Evaluation Plan Post Current Plans in Plans Room Full Scope Baseline Design Limited Scope Baseline Design Potential High?
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29 Conceptual ATCs (CATCs) include enough information that a rough estimate of the potential benefits, a view of possible drawbacks, and an estimate of the design and construction costs can be made for consideration against the published minimums and standards.
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30 pre-approved in the solicitation; hence no submittal is required. This type has also been used for maintenance of traffic plans on urban freeway projects.
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31 Table 4.8 WSDOT ATC Program 2009- 2012 (Adapted from Carpenter 2012)
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32 report. The case study research did uncover three divergent practices among case study participants that are worth noting and may be areas in which further research might add value.
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