Research for the AASHTO Committee on Environment and Sustainability. Task 109. Successful Practices for Environmental Commitments in Public/Private Partnerships (P-3) and Design-Build (D-B) Contracts

Public-private partnerships (P-3) are contractual agreements formed between a public agency and a private sector entity that allow for greater private sector participation in the delivery and financing of transportation projects. Under the P-3 model, a private partner may participate in some combination of design, construction, financing, operations, and maintenance. Many P-3 projects are also utilizing Design-Build (D-B), a project delivery method that combines two, usually separate services into a single contract. With D-B procurements, owners execute a single, fixed-fee contract for both architectural/engineering services and construction. The D-B unit may be a single firm, a consortium, joint venture or other organization assembled for a particular project. While the design-builder assumes responsibility for the majority of the design work and all construction activities, together with the risks associated with providing these services for a fixed fee, the owners typically retain responsibility for financing, operating and maintaining the project. In a related development, Section 1503 of the Safe, Accountable, Flexible and Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU; 2005) required FHWA to modify its rules regarding design-build contracts issued by state departments of transportation (state DOTs). The provision required FHWA to allow state DOT projects conducted under design-build contracts to proceed through the preliminary design stage before the NEPA process is complete. The Final Rule for Design-Build Contracting was issued August 14, 2007 and became effective September 13, 2007. This Rule streamlined the project development process for design-build projects by allowing state DOTs to conduct the NEPA process in parallel with entering into a design-build contract for the project and proceeding through the preliminary design stage. As a result, many state DOTs began considering using the D-B process to streamline project delivery. While the D-B method of project delivery can save time and promote effective co-ordination between the contracting agency, the designer, and the contractor, there are risks involved. One of those risks is that environmental commitments (including those made for historic properties/Section 106, Section 4(f) water quality permits and mitigation, threatened and endangered species, hazardous materials, air quality, and noise) either may be overlooked, not be adequately addressed, or require revisions due to subsequent design modifications made by the P-3 or D-B contractor. Failure to follow through on the commitments agreed upon during the NEPA process can have serious consequences, including project delays and damage to the relationships between a state DOT and its respective regulatory, land-managing, and Tribal partners, and potentially result in legal action. The purpose of this research is to identify and synthesize “successful practices” for how environmental commitments are kept in P-3 and D-B contracts. These practices may include the timing of NEPA analyses and commitment development. The research will include case studies that demonstrate how these practices are implemented and how they are transferable to other State DOTs.


  • English


  • Status: Completed
  • Funding: $125000
  • Contract Numbers:

    Project 25-25, Task 109

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Hartell, Ann

  • Performing Organizations:

    Louis Berger and Associates International, Incorporated

    1819 H Street, NW
    Washington, DC    20006-
  • Principal Investigators:

    Pesesky, Lawrence

  • Start Date: 20180402
  • Expected Completion Date: 20190401
  • Actual Completion Date: 20190401

Subject/Index Terms

Filing Info

  • Accession Number: 01659438
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 25-25, Task 109
  • Files: TRB, RIP
  • Created Date: Feb 6 2018 5:03AM