; (3) in subsection (d)(3) by striking fiscal years 2016 through 2020 and inserting fiscal years 2022 through 2025 ; (4) by redesignating subsection (f) as subsection (g); and (5) by inserting after subsection (e) the following: (f) Surplus amounts (1) In general Amounts made available to the Secretary to carry out this section that remain unobligated after awarding grants under subsection (c) shall be made available under the unsolicited research initiative under section 5506. (2) Limitation on amounts Amounts under paragraph (1) shall not exceed $2,000,000 for any given fiscal year. . 5105. Unsolicited research initiative (a) In general Chapter 55 of title 49, United States Code, is amended by inserting after section 5505 the following new section: 5506. Unsolicited research initiative (a) In general Not later than 180 days after the date of enactment of this section, the Secretary shall establish a program under which an eligible entity may at any time submit unsolicited research proposals for funding under this section. (b) Criteria A research proposal submitted under subsection (a) shall meet the purposes of the Secretary’s 5-year transportation research and development strategic plan described in section 6503(c)(1). (c) Project review Not later than 90 days after an eligible entity submits a proposal under subsection (a), the Secretary shall— (1) review the research proposal submitted under subsection (a); (2) evaluate such research proposal relative to the criteria described in subsection (b); (3) provide to such eligible entity a written notice that— (A) if the research proposal is not selected for funding under this section— (i) notifies the eligible entity that the research proposal has not been selected for funding; (ii) provides an explanation as to why the research proposal was not selected, including if the research proposal does not cover an area of need; and (iii) if applicable, recommend that the research proposal be submitted to another research program