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Guide for Pavement-Type Selection (2011) / Chapter Skim
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Appendix C - Example of Pavement-Type Selection in Design-Build Operations & Maintenance Projects
Pages 57-62

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From page 57...
... • Service-life estimates of initial pavement and structural rehabilitation -- The agency recommends that bidders follow agency guidelines in developing expected service lives of various pavement types and rehabilitation activities, as these estimates were developed using the agency's A P P E N D I X C Example of Pavement-Type Selection in Design-Build Operations & Maintenance Projects
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From page 58...
... 58 Evaluation Factor Criteria Weights Overall technical feasibility Pass/Fail Not required Feasibility of initial costs Pass/Fail Not required Adequacy of structural designs Pass/Fail Not required Adequacy of M&R activities Pass/Fail Not required Annual maintenance costs Numerical rating 10% Future rehabilitation costs Numerical rating 50% %03gnitarlaciremuNstsocresU Future work zone disruptions Numerical rating 10% Table C1. Agency's evaluation criteria.
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From page 59...
... • Since the lane closure timings have an impact on project completion time and road user costs, the contractor considers performing further analysis for strategy selection. • The contractor recognizes the importance of shorter completion time and fewer traffic disruptions for maintenance and rehabilitation activities.
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From page 60...
... Table C5 presents the summary of estimated user costs of all alternatives obtained from the probabilistic analysis. These estimates are based on the 10-hour lane closure schedule and associated project completion schedule.
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From page 61...
... Life-cycle cost estimates of feasible alternatives. Statistics Alternative 1 Alternative 2 Alternative 3 Alternative 4 Alternative 5 Mean NPV $372,000 $287,000 $271,000 $287,000 $330,000 Minimum NPV $312,000 $282,000 $246,000 $287,000 $323,000 Maximum NPV $441,000 $293,000 $315,000 $288,000 $338,000 90th Percentile $405,000 $290,000 $287,000 $287,000 $334,000 Percent difference in mean NPV 37% 6% 0% 6% 22% Note: The values in this table indicate estimated user costs for a 10-hour closure of two lanes of a 5-mile work zone section.
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From page 62...
... Similarly, although the 16-hour or 24-hour lane closures would provide for shorter project completion time, these strategies will result in longer queues, excessive delays, and higher user costs. Therefore, the contractor considers 10-hour road closure as the most feasible alternative.
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Key Terms

  • lane closure
  • user costs
  • work zone
  • pavement type
  • future rehabilitation

  • completion time
  • contractor reviews
  • project completion
  • pavement types
  • rehabilitation costs

  • structural designs
  • user cost
  • cost estimates
  • maintenance costs
  • numerical rating

  • estimated user
  • agency requires
  • agency evaluates
  • annual maintenance
  • adjusted bid

  • costs numerical
  • closure strategies
  • feasible alternatives
  • risk factor
  • zone section

  • rental fee
  • contractor costs
  • future work
  • lane rental
  • agency practices


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