1. Designation of high priority corridor on National Highway System (a) In general Section 1105(c)(9) of the Intermodal Surface Transportation Efficiency Act of 1991 ( Public Law 102–240 ) is amended by inserting before the period at the end the following: and including United States Route 15 in Pennsylvania from its intersection with Interstate Route 180 to the New York border . (b) Designation; signs (1) In general Section 1105(e)(5)(C)(i) of such Act is amended— (A) in the first sentence by inserting before the period at the end the following: , including United States Route 15 in Pennsylvania from its intersection with Interstate Route 180 to the New York border ; and (B) by inserting after the first sentence the following: The Commonwealth of Pennsylvania shall erect signs identifying the route referred to in subsection (c)(9) as Interstate Route 99, including United States Route 15 in Pennsylvania from its intersection with Interstate Route 180 to the New York border. . (2) Deadline The Commonwealth of Pennsylvania shall erect signs in accordance with the amendment made by paragraph (1) not later than 180 days after the date of enactment of this Act. (3) Grants (A) In general The Secretary of Transportation may make grants to the State of Pennsylvania for projects— (i) to erect signs along United States Route 15 in Pennsylvania from its intersection with Interstate Route 180 to the New York border identifying that highway segment as part of the Interstate System