; (2) a suicide prevention barrier; or (3) any other evidence-based suicide deterrent that is determined by the Secretary to be appropriate. (f) Priority In making a grant under the Program, the Secretary shall give priority to a project located in an area with a high rate of suicide, taking into consideration the number of suicides and rate of suicides per capita in an area, or other priority characteristics, as determined by the Secretary. (g) Federal share The Federal share of the cost of a project assisted with a grant under the Program may not exceed 80 percent. (h) Definitions In this section: (1) State The term State means each State of the United States, the District of Columbia, each commonwealth, territory, or possession of the United States, and each federally recognized Indian Tribe. (2) Evidence-based suicide deterrent The term evidence-based suicide deterrent means a suicide deterrent that demonstrates a rationale based on high-quality research findings or positive evaluation that such deterrent is likely to reduce or prevent suicide, and includes ongoing efforts to examine the effects of such deterrent. (i) Authorization of appropriations There is authorized to be appropriated to carry out the Program $10,000,000 for each of fiscal years 2024 through 2028. 3. Title 23 amendment Section 119(d)(2)(I) of title 23, United States Code, is amended by striking Highway System. and adding Highway System, including installation of safety barriers and nets on bridges of the National Highway System. . 4. Study on effectiveness of suicide prevention nets and barriers for structures other than bridges (a) Study The Comptroller General of the United States shall conduct a study to identify— (1) the types of structures, other than bridges, that attract a high number of individuals attempting suicide-by-jumping; (2) the characteristics that distinguish structures identified under paragraph (1) from similar structures that do not attract a high number of individuals attempting suicide-by-jumping