; and (iii) submit to the Secretary, Congress, and such recipient a report on the findings of each review under clause (ii). (3) Transparency Not later than 90 days after the submission of a report under paragraph (2)(C)(iii), the Secretary shall publish on the website of the Department of Transportation such report. (4) Megaproject defined In this subsection, the term megaproject means a project under this title that has an estimated total cost of $2,000,000,000 or more, and such other projects as may be identified by the Secretary. (l) Special experimental projects (1) Public availability The Secretary shall publish on the website of the Department of Transportation a copy of all letters of interest, proposals, workplans, and reports related to the special experimental project authority pursuant to section 502(b). (2) Notification and opportunity for comment Not later than 30 days before making a determination to proceed with an experiment under a letter of interest described in paragraph (1), the Secretary shall provide notification and an opportunity for public comment on the letter of interest and the Secretary’s proposed response. (3) Report to Congress Not later than 2 years after the date of enactment of the INVEST in America Act , the Secretary shall submit to the Committee on Transportation and Infrastructure of the House of Representatives and the Committee on Environment and Public Works of the Senate a report that includes— (A) a summary of each experiment described in this subsection carried out over the previous 5 years