23 USC 115 - Advance construction

(a) In General.— 
The Secretary may authorize a State to proceed with a project authorized under this title
(1) without the use of Federal funds; and
(2) in accordance with all procedures and requirements applicable to the project other than those procedures and requirements that limit the State to implementation of a project
(A) with the aid of Federal funds previously apportioned or allocated to the State; or

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(B) with obligation authority previously allocated to the State.
(b) Obligation of Federal Share.— 
The Secretary, on the request of a State and execution of a project agreement, may obligate all or a portion of the Federal share of a project authorized to proceed under this section from any category of funds for which the project is eligible.
[(c) Redesignated (d).]
(d) Inclusion in Transportation Improvement Program.— 
The Secretary may approve an application for a project under this section only if the project is included in the transportation improvement program of the State developed under section 135 (f).