; (2) the cost-effectiveness of the reductions described in paragraph (1); (3) the result of investments of funding under the program in minority and low-income communities that are disproportionately affected by ozone, carbon monoxide, and particulate matter; (4) the effectiveness, with respect to the attainment or maintenance of national ambient air quality standards under section 109 of the Clean Air Act ( 42 U.S.C. 7409 ) for ozone, carbon monoxide, and particulate matter, of performance measures established under section 150(c)(5) of title 23, United States Code, and performance targets established under subsection (d) of that section for traffic congestion and on-road mobile source emissions; (5) the extent to which there are any types of projects that are not eligible funding under the program that would be likely to contribute to the attainment or maintenance of the national ambient air quality standards described in paragraph (4); and (6) the extent to which projects under the program reduce sulfur dioxide, nitrogen dioxide, and lead. 1521. Roadside highway safety hardware (a) In general Not later than 2 years after the date of enactment of this Act, the Secretary shall implement the following recommendations from the report of the Government Accountability Office entitled Highway Safety: More Robust DOT Oversight of Guardrails and Other Roadside Hardware Could Further Enhance Safety published in June 2016 and numbered GAO–16–575: (1) Develop a process for third party verification of full-scale crash testing results from crash test labs to include a process for— (A) formally verifying the testing outcomes