; and (bb) innovative materials that may be further researched, developed, and used to meet those needs. (iii) Activities The collaboration described in clause (ii) may include— (I) the development of new training for State and Tribal agencies; and (II) the expansion of technical training that involves State or Tribal departments of transportation in the development of new construction designs for innovative materials at the Turner-Fairbank Highway Research Center. (iv) Priority research The Turner-Fairbank Highway Research Center shall prioritize research relating to— (I) the use of innovative materials in— (aa) bridges with a span equal to or greater than 50 feet; (bb) highway reconstruction and rehabilitation; and (cc) rural road infrastructure; and (II) coastal resiliency. (v) Funding Of the amounts made available to carry out this paragraph, the Secretary shall set aside $8,000,000 to carry out this subparagraph. (D) Authorization of appropriations There is authorized to be appropriated to carry out this paragraph for each of fiscal years 2019 through 2023 an amount equal to the sum of— (i) the amount appropriated to carry out this paragraph for fiscal year 2018