B. The Board may award contracts for the construction of transportation projects on a design-build basis. These contracts may be awarded after a written determination is made by the Commissioner of Highways or the Director of the Department of Rail and Public Transportation, pursuant to objective criteria previously adopted by the Board regarding the use of design-build, that delivery of the projects must be expedited and that it is not in the public interest to comply with the design and construction contracting procedures normally followed. Such objective criteria shall include requirements for prequalification of contractors and competitive bidding processes. These contracts shall be of such size and scope to encourage maximum competition and participation by agency prequalified and otherwise qualified contractors. Such determination shall be retained for public inspection in the official records of the Department of Transportation or the Department of Rail and Public Transportation, as the case may be, and shall include a description of the nature and scope of the project and the reasons for the Commissioner's or the Director's determination that awarding a design-build contract will best serve the public interest. A Request for Proposal for transportation projects to be delivered on a design-build basis pursuant to this section may allow for the submission and consideration of alternative technical concepts in accordance with the procedures set forth in such Request for Proposal. The provisions of this section shall supersede contrary provisions of subsection D of § 2.2-4303. For the purposes of this subsection, "alternative technical concepts" means proposed changes to agency-supplied base design configurations, project scope, design, or construction criteria that provide a solution that is equal to or better than the requirements in the Request for Proposal.