Truck Parking Safety Improvement Act This bill authorizes appropriations through FY2026 to the Department of Transportation (DOT) to provide parking for commercial motor vehicles on the federal-aid highway system. DOT must provide competitive grants to states, metropolitan planning organizations, local governments, and tribal governments for projects that improve the safety of commercial motor vehicle operators and provide parking for commercial motor vehicles on federal-aid highways or on a facility with reasonable access to such a highway or a freight facility. The federal share for a project carried out in accordance with the bill shall be up to 100%.