; and (2) by striking the second sentence. 6. Funding for highway research and development program (a) Authorization of appropriations There is authorized to be appropriated out of the Highway Trust Fund (other than the Mass Transit Account) to carry out section 503(b) of title 23, United States Code, $115,000,000 for each of fiscal years 2019 through 2023. (b) Applicability of title 23, United States Code Funds authorized to be appropriated by subsection (a) shall— (1) be available for obligation in the same manner as if those funds were apportioned under chapter 1 of title 23, United States Code, except that the Federal share of the cost of a project or activity carried out using those funds shall be 80 percent, unless otherwise expressly provided by this Act (including the amendments by this Act) or otherwise determined by the Secretary