; and (2) $5,500,000 shall be for the National Driver Register authorized under chapter 303 of title 49, United States Code: Provided further , That within the $155,300,000 obligation limitation for operations and research, $20,000,000 shall remain available until September 30, 2021, and shall be in addition to the amount of any limitation imposed on obligations for future years. Highway traffic safety grants (liquidation of contract authorization) (limitation on obligations) (highway trust fund) For payment of obligations incurred in carrying out provisions of 23 U.S.C. 402 , 404, and 405, and section 4001(a)(6) of the Fixing America's Surface Transportation Act, to remain available until expended, $623,017,000, to be derived from the Highway Trust Fund (other than the Mass Transit Account): Provided , That none of the funds in this Act shall be available for the planning or execution of programs for which the total obligations in fiscal year 2020 are in excess of $623,017,000 for programs authorized under 23 U.S.C. 402 , 404, and 405, and section 4001(a)(6) of the Fixing America's Surface Transportation Act: Provided further , That of the sums appropriated under this heading: (1) $279,800,000 shall be for Highway Safety Programs under 23 U.S.C. 402 ; (2) $285,900,000 shall be for National Priority Safety Programs under 23 U.S.C. 405 ; (3) $30,500,000 shall be for the High Visibility Enforcement Program under 23 U.S.C. 404