eligible project

(A) means a project in a nonattainment or maintenance area described in paragraph (4)(A) for—

(i) purchasing or leasing clean fuel buses, including buses that employ a lightweight composite primary structure;

(ii) constructing or leasing clean fuel buses or electrical recharging facilities and related equipment for such buses; or

(iii) constructing new or improving existing public transportation facilities to accommodate clean fuel buses; and

(B) at the discretion of the Secretary, may include a project located in a nonattainment or maintenance area described in paragraph (4)(A) relating to clean fuel, biodiesel, hybrid electric, or zero emissions technology buses that exhibit equivalent or superior emissions reductions to existing clean fuel or hybrid electric technologies.

(A) a highway or bridge project eligible for assistance under title 23;

(B) a public transportation project eligible for assistance under chapter 53;

(C) a passenger rail or freight rail transportation project eligible for assistance under this title;

(D) a port infrastructure investment, including—

(i) inland port infrastructure; and

(ii) a land port-of-entry;

(E) the surface transportation components of an airport project eligible for assistance under part B of subtitle VII;

(F) a project for investment in a surface transportation facility located on Tribal land, the title or maintenance responsibility of which is vested in the Federal Government;

(G) a project to replace or rehabilitate a culvert or prevent stormwater runoff for the purpose of improving habitat for aquatic species that will advance the goal of the program described in subsection (b)(2); and

(H) any other surface transportation infrastructure project that the Secretary considers to be necessary to advance the goal of the program.

(A) airport-specific air traffic facilities and equipment, including local area augmentation systems, instrument landing systems, weather and wind shear detection equipment, and lighting improvements;

(B) automation tools to effect improvements in airport capacity, including passive final approach spacing tools and traffic management advisory equipment; and

(C) equipment and software that enhance airspace control procedures or assist in en route surveillance, including oceanic and offshore flight tracking.

(A) the Secretary determines, under the criteria established pursuant to paragraph (3), is a main street project;

(B) is carried out within the jurisdiction of a smaller community receiving the grant; and

(C) involves the development of affordable housing that is located in the commercial area that is the subject of the project.

(i) a bundle of projects described in subparagraph (A), regardless of whether the bundle of projects meets the requirements of section 144(j)(5); and

(ii) a project to replace or rehabilitate culverts for the purpose of improving flood control and improved habitat connectivity for aquatic species.

(A) means a project for—

(i) purchasing or leasing clean fuel buses, including buses that employ a lightweight composite primary structure;

(ii) constructing or leasing clean fuel buses or electrical recharging facilities and related equipment;

(iii) improving existing mass transportation facilities to accommodate clean fuel buses;

(iv) repowering pre-1993 engines with clean fuel technology that meets the current urban bus emission standards; or

(v) retrofitting or rebuilding pre-1993 engines if before half life to rebuild; and

(B) in the discretion of the Secretary, may include projects relating to clean fuel, biodiesel, hybrid electric, or zero emissions technology vehicles that exhibit equivalent or superior emissions reductions to existing clean fuel or hybrid electric technologies.

(A) a highway or bridge project eligible for assistance under title 23;

(B) a public transportation project eligible for assistance under chapter 53;

(C) a passenger rail or freight rail transportation project eligible for assistance under this title;

(D) a port infrastructure investment, including—

(E) the surface transportation components of an airport project eligible for assistance under part B of subtitle VII;

(F) a project for investment in a surface transportation facility located on Tribal land, the title or maintenance responsibility of which is vested in the Federal Government;

(G) a project to replace or rehabilitate a culvert or prevent stormwater runoff for the purpose of improving habitat for aquatic species that will advance the goal of the program described in subsection (b)(2); and

(H) any other surface transportation infrastructure project that the Secretary considers to be necessary to advance the goal of the program.

(A) to construct a new or replace an existing eligible electric power transmission line;

(B) to increase the transmission capacity of an existing eligible electric power transmission line; or

(C) to connect an isolated microgrid to an existing transmission, transportation, or telecommunications infrastructure corridor located in Alaska, Hawaii, or a territory of the United States.