Guide on Progressive Design-Build for Transportation Projects

The most commonly used methodology for design-build (DB) contractor selection involves a best value process, with significant weight accorded to price, resulting in a fixed-price contract for design development and construction. Progressive design-build (PDB) is a recent variation that allows early contractor involvement with elements similar to a construction manager/general contractor (CM/GC) approach. Similar to the process used for CM/GC, pricing negotiation occurs for final design and construction in the preliminary design phase. But unlike CM/GC, PDB continues to transfer design liability and construction responsibilities to a DB team starting with the preliminary planning and design phase through to construction completion. PDB contracts include procedures for development of the design, schedule/phasing plan, and a price for final design and construction typically in the form of a guaranteed maximum price (GMP), targeted maximum price (TMP), or agreed lump sum. The development of the price is a key component of PDB as it allows owners to hire a progressive designer-builder without a total price commitment for final design and construction until reasonable design details are defined. Currently, state departments of transportation (DOTs) are utilizing variations in terminology, differing approaches in early progressive design-build team (PDBT)/state interactions, and varying contracting mechanisms due to the limited guidance available to implement PDB on their highway projects. To help state DOTs understand the benefits offered by PDB for transportation projects, research is needed to explore how PDB can be effectively implemented on highway projects. The objective of this research is to develop a guide for state DOTs to effectively and efficiently use PDB delivery for transportation projects that includes assistance with project planning and selection, project implementation, procurement, pricing procedures, and contract administration.


  • English


  • Status: Proposed
  • Funding: $300000
  • Contract Numbers:

    Project 10-115

  • 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:

    McKenney, Christopher

  • Start Date: 20230502
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01846778
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 10-115
  • Files: TRB, RIP
  • Created Date: May 24 2022 7:27PM