; (2) the volume of commercial motor vehicle traffic in the State; and (3) whether there are any areas within the State that have a shortage of adequate commercial motor vehicle parking facilities, including an analysis (economic or otherwise, as the State determines to be appropriate) of the underlying causes of any such shortages. (g) Approval (1) In general The Secretary of Transportation shall approve a State freight plan described in subsection (a) if the plan achieves compliance with the requirements of this section. (2) Savings provision Nothing in this subsection establishes new procedural requirements for the approval of a State freight plan described in subsection (a). . (b) Studies For the purpose of facilitating the integration of freight transportation into an intelligent transportation system network powered by electricity, the Secretary, acting through the Administrator of the Federal Highway Administration, shall conduct 2 or more appropriate studies relating to— (1) preparing to supply power to applicable electrical freight infrastructure; and (2) safely integrating freight into a smart vehicle world. 1406. Utilizing significant emissions with innovative technologies (a) Research, investigation, training, and other activities Section 103 of the Clean Air Act ( 42 U.S.C. 7403 ) is amended— (1) in subsection (c)(3), in the first sentence of the matter preceding subparagraph (A), by striking percursors and inserting precursors ; and (2) in subsection (g)— (A) by redesignating paragraphs (1) through (4) as subparagraphs (A) through (D), respectively, and indenting appropriately; (B) in the undesignated matter following subparagraph (D) (as so redesignated)— (i) in the second sentence, by striking The Administrator and inserting the following: (5) Coordination and avoidance of duplication The Administrator ; and (ii) in the first sentence, by striking Nothing and inserting the following: (4) Effect of subsection Nothing