This bill aims to modify the allocation requirements for federal highway safety program funds, specifically amending Title 23, United States Code. It reduces the mandatory percentage of these funds that states are required to spend through their political subdivisions. For states designated as a "rural State" , this percentage is lowered from 40 percent to 20 percent, providing increased flexibility in fund utilization. A "rural State" is precisely defined as any state whose population density falls below the national average, as determined by the most recent decennial Census data.