; and (2) long-distance passenger rail routes and services should be sustained to ensure connectivity throughout the National Network (as defined in section 24102 of title 49, United States Code). Federal transit administration TRANSIT FORMULA GRANTS (LIQUIDATION OF CONTRACT AUTHORIZATION) (LIMITATION ON OBLIGATIONS) (HIGHWAY TRUST FUND) For payment of obligations incurred in the Federal Public Transportation Assistance Program in this account, and for payment of obligations incurred in carrying out the provisions of 49 U.S.C. 5305 , 5307, 5310, 5311, 5312, 5314, 5318, 5329(e)(6), 5334, 5335, 5337, 5339, and 5340, section 20005(b) of Public Law 112–141 , and section 3006(b) of Public Law 114–94 , $13,990,000,000, to be derived from the Mass Transit Account of the Highway Trust Fund and to remain available until expended: Provided, That funds available for the implementation or execution of programs authorized under 49 U.S.C. 5305 , 5307, 5310, 5311, 5312, 5314, 5318, 5329(e)(6), 5334, 5335, 5337, 5339, and 5340, section 20005(b) of Public Law 112–141 , and section 3006(b) of Public Law 114–94 , shall not exceed total obligations of $13,990,000,000 in fiscal year 2024. TRANSIT INFRASTRUCTURE GRANTS For an additional amount for buses and bus facilities grants under section 5339(b) of title 49, United States Code, low or no emission grants under section 5339(c) of such title, ferry boats grants under section 5307(h) of such title, bus testing facilities under section 5318 of such title, accelerating innovative mobility initiative grants under section 5312 of such title, accelerating the adoption of zero emission buses under section 5312 of such title, Congressionally Directed Spending for projects and activities eligible under chapter 53 of such title, and ferry service for rural communities under section 71103 of division G of Public Law 117–58 , $268,261,000, to remain available until expended: Provided, That of the sums provided under this heading in this Act— (1) $80,000,000 shall be available for buses and bus