under this chapter. (k) Period of availability of funds Amounts made available for projects under this section shall remain available for a period of 3 years after the last day of the fiscal year in which the amounts are made available. . (b) Clerical amendment The analysis for chapter 1 of title 23, United States Code, is amended by adding at the end the following: 180. Parking for commercial motor vehicles. . 4. Survey and comparative assessment (a) In general Not later than 4 years after the date of enactment of this Act, and every 2 years thereafter, the Secretary of Transportation, in consultation with appropriate State motor carrier safety personnel, motor carriers, State departments of transportation, and private providers of commercial motor vehicle parking, shall submit to the Committee on Environment and Public Works of the Senate and the Committee on Transportation and Infrastructure of the House of Representatives a report that— (1) evaluates the availability of adequate parking and rest facilities, taking into account both private and public facilities, for commercial motor vehicles engaged in interstate transportation