; and (b) not to exceed $10,000,000 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. 144. An additional $500,000 shall be made available to the National Highway Traffic Safety Administration for a study to identify and examine child-specific safety considerations in vehicles equipped with Automated Driving Systems, particularly those that can be operated bi-directionally and offer unconventional seating. The study should also incorporate safety considerations for child restraint system (CRS) installation and promoting CRS usage for ride-share programs, and the risks associated with unattended child passengers in Automated Driving Systems-equipped vehicles. Upon completion of this study, the National Highway Traffic Safety Administration shall submit to the House and Senate Committees on Appropriations a report containing its findings, including detailing how the agency is coordinating with manufacturers to ensure children are protected in vehicles equipped with Automated Driving Systems. 145. None of the funds appropriated or otherwise made available in this Act or any other Act may be used to finalize or enforce a proposed rule published by the National Highway Traffic Safety Administration and the Environmental Protection Agency on August 2, 2018, entitled “The Safer Affordable Fuel-Efficient Vehicles Rule” or any other successor rule. 146. None of the funds in this Act or any other Act shall be used to enforce the requirements of 23 U.S.C. 405(a)(9) . Federal railroad administration Safety and operations For necessary expenses of the Federal Railroad Administration, not otherwise provided for, $226,698,000, of which $20,000,000 shall remain available until expended. Railroad research and development For necessary expenses for railroad research and development, $41,600,000, to remain available until expended. Railroad rehabilitation and improvement financing program The