; and (2) by adding at the end the following: (v) Operation of vehicles on certain North Carolina highways If any segment in the State of North Carolina of United States Route 17, United States Route 29, United States Route 52, United States Route 64, United States Route 70, United States Route 74, United States Route 117, United States Route 220, United States Route 264, or United States Route 421 is designated as a route on the Interstate System, a vehicle that could operate legally on that segment before the date of such designation may continue to operate on that segment, without regard to any requirement under subsection (a). . 1519. Interstate exemption Notwithstanding section 111 of title 23, United States Code, if the segment of highway described in paragraph (92) of section 1105(c) of the Intermodal Surface Transportation Efficiency Act of 1991 ( Public Law 102–240 ; 105 Stat. 2032) is designated as a route on the Interstate System, any commercial establishment operating legally in a rest area on that segment before the date of that designation may continue to operate in the Interstate right-of-way, subject to the Interstate access standards established under section 111 of that title. 1520. Report on air quality improvements (a) In general Not later than 3 years after the date of enactment of this Act, the Comptroller General of the United States shall submit a report that evaluates the congestion mitigation and air quality improvement program under section 149 of title 23, United States Code (referred to in this section as the program ), to— (1) the Committee on Environment and Public Works of the Senate; and (2) the Committee on Transportation and Infrastructure of the House of Representatives. (b) Contents The evaluation under subsection (a) shall include an evaluation of— (1) the reductions of ozone, carbon monoxide, and particulate matter that result from projects under the program; (2) the cost-effectiveness of the reductions described in paragraph (1)