Systematic Approach for Determining Construction Contract Time: A Guidebook (2022) / Chapter Skim
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Pages 39-62
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39 e acceleration of highway construction is more critical today than it was in the past for state DOTs because of the continuously growing number of construction projects in urban areas driven by urbanization and the rapid population growth. According to the FHWA, about 35 percent of U.S.
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40 Systematic Approach for Determining Construction Contract Time: A Guidebook Optimized trac management plans will help reduce the construction time, and the use of some form of incentives/disincentives (e.g., A+B+I/D, NEB, and lane rental [LR] approaches)
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CTD Guide for Urban Projects with Incentive Provisions 41 2. The "B" component is a bid for the total number of calendar days required to complete the project, as estimated by the bidder.
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42 Systematic Approach for Determining Construction Contract Time: A Guidebook Table 3-1. Summary of the characteristics of major ACTs for urban projects (Part 1)
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CTD Guide for Urban Projects with Incentive Provisions 43 Table 3-2. Summary of the characteristics of major ACTs for urban projects (Part 2)
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44 Systematic Approach for Determining Construction Contract Time: A Guidebook AADT = annual average daily traffic. Figure 3-2.
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CTD Guide for Urban Projects with Incentive Provisions 45 The steps of this procedure are presented in greater detail in the following sections. 3.2.1 Step 1 -- Determine the Appropriate ACT With regard to project type, size, complexity, and urgency of accelerated construction, determine the appropriate ACTs.
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46 Systematic Approach for Determining Construction Contract Time: A Guidebook 3.3 CTD Procedure for Urban Projects -- Steps and Sub-Steps 3.3.1 Step 1 -- Determine the Appropriate ACTs e rst step in determining the contract time of an urban project is to determine the ACT that will be best suited for the purpose and characteristics of the project. Figure 3-3 presents the three sub-steps that are considered the best procedure to determine the most appropriate ACT with respect to the project type, size, complexity, and urgency of completion.
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CTD Guide for Urban Projects with Incentive Provisions 47 Step 1 Determine Appropriate ACT Figure 3-4 provides an overview that summarizes key aspects of Step 1. Required documents and information.
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48 Systematic Approach for Determining Construction Contract Time: A Guidebook 3.3.2 Step 2 -- Identify "What-If" Scenarios When determining contract times for urban projects, choices of lane closure schemes (e.g., single-lane closure, double-lane closure, and full-lane closure with counter-ow tra c) and construction windows (e.g., nighttime, weekday, weekend, and around-the-clock)
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CTD Guide for Urban Projects with Incentive Provisions 49 Step 2 Identify "What-if" Scenarios Required documents and information. State regulations, federal or state agency guidelines, regional Traffic Management Plan (TMP)
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50 Systematic Approach for Determining Construction Contract Time: A Guidebook 3.3.3 Step 3 -- Estimate Project Duration Aer the appropriate ACT has been determined and several feasible construction alternatives have been proposed, it is time to estimate the project duration in terms of the number of working days. e outcome of this step is the PDE.
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CTD Guide for Urban Projects with Incentive Provisions 51 Required documents and information. Construction alternatives (identified from Step 2)
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52 Systematic Approach for Determining Construction Contract Time: A Guidebook 3.3.4 Step 4 -- Assess Mobility Impact e objective of this step is to assess and quantify the tra c mobility impact. For each alternative, the assessment includes estimates of daily and total RUCs and mobility impacts (e.g., delayed time due to work zone tra c impact)
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CTD Guide for Urban Projects with Incentive Provisions 53 Step 4 Assess Mobility Impact Required documents and information. Key information of the work zone, such as traffic pattern and volume, number of lanes, number of lanes closed, work time, lane closure length, lane width, grade, road type, direction of travel, area type (urban)
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54 Systematic Approach for Determining Construction Contract Time: A Guidebook 3.3.5 Step 5 -- Select the Most Feasible Option Aer accounting for prioritized values and/or trade-o s with regard to project duration, cost, and the amount of tra c disruption for each of the alternatives considered, the agency can then select the most feasible and economical option for the given project. Figure 3-11 provides details for each of the sub-steps involved in Step 5, and Figure 3-12 provides an overview that summarizes key aspects of this step.
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CTD Guide for Urban Projects with Incentive Provisions 55 Step 5 Select the Most Feasible Option Required documents and information. Project goal and objective statements, the agency's Regional Traffic Plan, and the TMP plan.
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56 Systematic Approach for Determining Construction Contract Time: A Guidebook 3.3.6 Step 6 -- Determine Risk Level ACTs are likely to increase the possibility of change orders, which can result in substantial delays in contract time. erefore, it is crucial to identify any potential risks associated with external factors that may a ect the completion time of the project.
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CTD Guide for Urban Projects with Incentive Provisions 57 Step 6 Determine Risk Level Required documents and information. ROW maps, ROW availability records, and property owners' real property interests.
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58 Systematic Approach for Determining Construction Contract Time: A Guidebook Step 7 Adjust Project Duration in Step 3 3.3.7 Step 7 -- Adjust Project Duration in Step 3 For the selected nal alternative, an accelerated production rate may need to be applied because it is expected that the contractor may use more resources when I/D clauses are included in the contract. Typically, 15 percent to 20 percent more resources are used in projects with I/D clauses as compared to a conventional schedule.
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CTD Guide for Urban Projects with Incentive Provisions 59 Step 7 Adjust Project Duration in Step 3 Required documents and information. The DRUC and adjusted project duration based on the final alternative (selected ACT or combination of ACTs)
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60 Systematic Approach for Determining Construction Contract Time: A Guidebook Step 8 Maximum Time Allowed 3.3.8 Step 8 -- Maximum Time Allowed It is recommended that urban ACT projects dene the contract time by calendar days or in relation to a xed completion date. Conversion of working days to calendar days is needed to determine the most reasonable contract time and to ensure that the project will be completed within the acceptable timeline.
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CTD Guide for Urban Projects with Incentive Provisions 61 Step 8 Maximum Time Allowed Required documents and information. The anticipated letting time, project duration in working days, state regulations, federal or state agency guidelines, standards specifications, CTD manuals, construction manuals, project requirements, and design plans.
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62 Systematic Approach for Determining Construction Contract Time: A Guidebook 3.4 References Anderson, S
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