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From page 29... ... 29 Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic This chapter describes the specific practices used by transportation agencies in the United States to construct or rehabilitate concrete pavements under traffic conditions. The agency-specific construction and rehabilitation practices and experiences were compiled from a survey of transportation agencies and follow-up interviews with agency personnel. Read the entire page →
From page 30... ... 30 Construction and Rehabilitation of Concrete Pavements Under Traffic the frequency of construction or rehabilitation of concrete pavements, with the construction/ rehabilitation frequency evaluated using an adjectival rating scale of "never" to "very frequently." Over 50% of the survey respondents (23 out of 45 agencies) indicated that they frequently or very frequently constructed JPCP, and another 27% (12 out of 45 agencies) Read the entire page →
From page 31... ... Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic 31 precast repairs) Read the entire page →
From page 32... ... 32 Construction and Rehabilitation of Concrete Pavements Under Traffic v the same time as the lane closure operation [23% (9 out of 39 agencies) Read the entire page →
From page 33... ... Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic 33 maintain motorist and worker safety. These two strategies are (1) Read the entire page →
From page 34... ... 34 Construction and Rehabilitation of Concrete Pavements Under Traffic • North Dakota specifications allow for use of HES concrete; however, North Dakota reported that it had experienced durability issues with HES that have led to its reduced use in recent years. • Nebraska noted that it uses RCA and RAP as a base course material. Read the entire page →
From page 35... ... Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic 35 Paving Equipment and Concrete Placement In recent years, there have been many improvements in paving equipment and concrete placement techniques that help with various aspects of construction and rehabilitation of concrete pavements under traffic, including accelerating construction, reducing clearance requirements, and allowing earlier opening to traffic. A summary of the materials and design practices used by highway agencies is shown in Figure 5. Read the entire page →
From page 36... ... 36 Construction and Rehabilitation of Concrete Pavements Under Traffic Paving Operations As in the case of paving equipment, paving operations can also affect the extent and duration of traffic impacts. Decisions on closures, detours, two-lane versus one-lane paving, and haul roads all play a key role in how quickly a project can be completed and in MOT plans. Read the entire page →
From page 37... ... Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic 37 Project Management Proper management of a construction project is necessary to ensure that the project is proceeding as planned and is completed on time and within budget while meeting agency needs for quality, safety, and traffic impacts. A summary of the project management practices used by the survey respondents is presented in Figure 7. Read the entire page →
From page 38... ... 38 Construction and Rehabilitation of Concrete Pavements Under Traffic A majority of survey respondents (84%, 32 out of 38 agencies) used a conventional DBB project delivery method. Read the entire page →
From page 39... ... Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic 39 Seventy-six percent (29 out of 38 agencies) of the respondents used VE, a systematic process of review and analysis of a project (during the concept and design phases) Read the entire page →
From page 40... ... 40 Construction and Rehabilitation of Concrete Pavements Under Traffic • Utah's procurement type is based on what will provide best value (e.g., complicated projects work best under DB or CM/GC, contractor can be involved in MOT) Read the entire page →
From page 41... ... Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic 41 percentages of roadway capacity) , liquidated savings (rewarding the contractor for each calendar day the contract is completed and accepted prior to the expiration of allowable contract time) Read the entire page →
From page 42... ... 42 Construction and Rehabilitation of Concrete Pavements Under Traffic conducted meetings within the highway agency design and construction staff during design and prior to construction. Project coordination meetings were less frequently used by highway agencies. Read the entire page →
From page 43... ... Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic 43 Summaries of additional responses regarding agency-specific public outreach practices are as follows: • The Illinois Tollway uses emails to I-Pass patrons who may be affected by a construction project. • Nebraska uses portable and permanent variable message boards to notify travelers of upcoming work. Read the entire page →
From page 44... ... 44 Construction and Rehabilitation of Concrete Pavements Under Traffic Less common practices, such as 511 traveler information systems, highway information networks/websites, and temporary motorist information signs, were used by 65% (26 out of 40 agencies) , 50% (20 out of 40 agencies) Read the entire page →
From page 45... ... Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic 45 Reason Number (percentage) of Agencies Noting Reason for Modifying Standard Practice Responses Most Important Important Neutral Somewhat Important Least Important Legislative/statutory requirement 3 8.8% 9 26.5% 9 26.5% 6 17.6% 7 20.6% 34 Expedited construction operations 10 27.0% 25 67.6% 2 5.4% 0 0.0% 0 0.0% 37 Reduced traffic delays 1847.4% 19 50.0% 0 0.0% 0 0.0% 1 2.6% 38 Maintenance of safe traffic operations 23 60.5% 13 34.2% 1 2.6% 0 0.0% 1 2.6% 38 Increased road-user satisfaction 8 22.2% 23 63.9% 4 11.1% 0 0.0% 1 2.8% 36 Perceived risk-sharing or risktransfer benefit 2 5.7% 7 20.0% 17 48.6% 7 20.0% 2 5.7% 35 Perceived maintenance costsaving benefit 6 16.7% 23 63.9% 4 11.1% 2 5.6% 1 2.8% 36 Perceived construction costsaving benefit 6 17.6% 21 61.8% 3 8.8% 3 8.8% 1 2.9% 34 Perceived life-cycle costsaving benefit 8 21.6% 23 62.2% 3 8.1% 1 2.7% 2 5.4% 37 Perceived performanceimprovement benefit 6 17.1% 22 62.9% 5 14.3% 1 2.9% 1 2.9% 35 Potential for greater contractor innovation 2 5.7% 15 42.9% 16 45.7% 1 2.9% 1 2.9% 35 Protection against premature concrete pavement failures 9 25.7% 23 65.7% 2 5.7% 1 2.9% 1 2.9% 35 Agency policy, bidding, outsourcing, or procurement guidelines encourage use of innovative practices 1 2.9% 16 45.7% 13 37.1% 3 8.6% 2 5.7% 35 Positive experience of other agencies 1 2.9% 10 28.6% 13 37.1% 7 20.0% 4 11.4% 35 Table 10. Read the entire page →
From page 46... ... 46 Construction and Rehabilitation of Concrete Pavements Under Traffic Reservations/Concerns Number (percentage) of Agencies Noting Reservation/Concern for Modifying Standard Practice Responses Most Important Important Neutral Somewhat Important Least Important Prohibited or discouraged by state law 2 6.1% 4 12.1% 12 36.4% 1 3.0% 14 42.4% Prohibited or discouraged by agency administrative policy or bidding and procurement guidelines 2 5.9% 8 23.5% 8 23.5% 5 14.7% 11 32.4% Potentially higher bid prices 00.0% 23 63.9% 4 11.1% 6 16.7% 3 8.3% Local construction contractor resistance 3 8.6% 14 40.0% 7 20.0% 7 20.0% 4 11.4% Possible increase in change orders/work orders 0 0.0% 11 33.3% 14 42.4% 5 15.2% 3 9.1% Risk-sharing/risk-transfer concerns 0 0.0% 12 35.3% 17 50.0% 2 5.9% 3 8.8% Absence of established performance criteria/standards 3 8.6% 12 34.3% 12 34.3% 5 14.3% 3 8.6% Perceived negative impact on competition (i.e., reduced number of bidders, particularly among small contractors) Read the entire page →

From page 29...

... 29 Agency Perspectives and Practices for Constructing or Rehabilitating Concrete Pavements Under Traffic This chapter describes the specific practices used by transportation agencies in the United States to construct or rehabilitate concrete pavements under traffic conditions. The agency-specific construction and rehabilitation practices and experiences were compiled from a survey of transportation agencies and follow-up interviews with agency personnel.