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ACTT Workshop: New Hampshire
Bridging Multiple Communities

Chapter 4: Conclusions

4.1. Next Steps

In the days following the I-93 Improvements workshop, NHDOT asked various skill set members to prioritize each idea on a scale of 1 to 10, ranking its potential to accelerate construction. Key NHDOT personnel then reviewed these rankings and compiled the following set of final recommendations.

In addition to bringing forth numerous innovative ideas, the workshop affirmed many of the ideas/strategies that NHDOT was considering for use on the project. Some of these ideas would normally be outside of the department's standard procedure or practices, but NHDOT administration believes that it would be beneficial to utilize them on a project of this magnitude.

The workshop provided the opportunity for NHDOT personnel to discuss a plethora of innovative ideas with experts from across the country. NHDOT plans on evaluating each of the final recommendations and developing a plan for implementation during the remainder of the design and construction phases.

Once again, the ACTT process has proven to be a valuable tool in project planning, innovation and success.

4.2. Final Recommendations

Geotechnical/Materials/Long-life Pavement/Maintenance
  • Consider breaking out the final paving contract.
  • Consider onsite HMA drum/crusher/concrete/precast plants.
  • Consider utilizing a perpetual pavement design.
  • Include joint cracking prevention in the pavement program.
  • Use underdrains versus additional sand in the typical section.
  • Provide web access to LIMS and other materials databases.
  • Reclaim pavements when possible and appropriate.
Construction/Environment
Construction
  • Complete constructability reviews and evaluate material hauling routes outside of the mainline.
  • Optimize construction sequencing by utilizing corridor-wide CPM scheduling.
  • Assign a corridor-wide traffic control manager.
  • Assign a corridor-wide construction management team.
  • Develop contracts to establish corridor-wide monitors for environmental, water quality and erosion control efforts.
Environment
  • Finalize TMDL issues for the eight-lane section by the end of 2007.
  • Develop a multi-agency technical advisory team.
  • Develop a risk management plan for resource protection.
  • Secure a water source.
Innovative Financing/Contracting
  • Evaluate larger contracts.
    • Consider total cost, schedule, traffic control and constructability issues.
  • Utilize time-based contracting strategies when appropriate, such as:
    • A-plus-B bidding.
    • Incentives/disincentives.
    • AMPM.
    • Tied bidding.
  • Complete reviews on constructability and contract packaging with industry.
Structures/Roadway/Geometric Design
Structures
  • Minimize phased construction.
  • Utilize NHDOT's existing partial-depth precast concrete deck panel substitution option at all bridge locations; full-depth precast post-tensioned concrete deck panels may be considered on bridges that require rapid construction.
  • Consider stub abutments on piles (piles are required due to seismic) behind mechanically stabilized earth (MSE) walls first. Prefabrication of bridge substructures, including precast stub abutments, could be used to accelerate construction when appropriate.
  • Skid bridges using self-propelled modular transporters (SPMTs) and other means.
  • Consider relocating utilities off bridges.
  • Advertise an early contract for fabrication of structural steel and precast elements to expedite construction and to increase supplier capacity.
  • Consider acceptance of intent-to-build shop drawing plans to expedite review time.
  • Consider acceptance of electronic shop drawings to expedite review time.
  • Consider bare decks where pavement shoving is a concern.
  • Use prefabricated retaining walls.
  • Consider relaxing winter construction restrictions.
Roadway/Geometric Design
  • Balance earthwork contracts.
  • Investigate full-scale crossover from northbound to southbound or vice versa.
  • Consider reimbursement for utility relocations.
Traffic Management/Safety/ITS/Incident Management/Public Relations
Traffic Management
  • Establish a corridor-wide traffic control manager.
  • Establish a local operations center.
  • Utilize smart work zone technology.
  • Institute a courtesy vehicle program.
  • Improve emergency access.
Public Relations
  • Develop a detailed PR plan to keep users informed.
  • Consider hiring a full-time PR firm to develop the plan.
  • Consider establishing a full-time PR position to manage the plan.
Right-of-Way/Utilities
ROW
  • Establish a dedicated ROW coordinator for the corridor.
  • Complete early ROW definitions and advance acquisitions when possible.
  • Simplify the ROW plan process.
  • Utilize incentives to accelerate ROW acquisition.
Utilities
  • Identify early utility relocations in the critical path.
  • Continue use of the SUE program.
  • Establish a dedicated utility coordinator.
  • Consider partnering with utilities to share cost when appropriate.
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Updated: 10/31/2013
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000