142. In addition to the amounts made available under the heading, Operations and Research (Liquidation of Contract Authorization) (Limitation on Obligations) (Highway Trust Fund) for carrying out the provisions of section 403 of title 23, United States Code, $4,000,000 shall be available to continue a high visibility enforcement paid-media campaign regarding highway-rail grade crossing safety in collaboration with the Federal Railroad Administration. Federal railroad administration Safety and operations For necessary expenses of the Federal Railroad Administration, not otherwise provided for, $221,698,000, of which $15,900,000 shall remain available until expended. Railroad research and development For necessary expenses for railroad research and development, $40,600,000, to remain available until expended. Railroad rehabilitation and improvement financing program The Secretary of Transportation is authorized to issue direct loans and loan guarantees pursuant to sections 501 through 504 of the Railroad Revitalization and Regulatory Reform Act of 1976 ( Public Law 94–210 ), as amended, such authority shall exist as long as any such direct loan or loan guarantee is outstanding. Federal-state partnership for state of good repair For necessary expenses related to Federal-State Partnership for State of Good Repair Grants as authorized by section 24911 of title 49, United States Code, $300,000,000, to remain available until expended: Provided , That the Secretary may withhold up to one percent of the amount provided under this heading for the costs of award and project management oversight of grants carried out under section 24911 of title 49, United States Code: Provided further , That the Secretary shall issue the Notice of Funding Opportunity that encompasses funds provided under this heading in this Act and previously unawarded funds provided under this heading in fiscal year 2017 by Public Law 115–31 and fiscal year 2018 by Public Law 115–141 , no later than 30 days after enactment of this Act: Provided further ,