Truck Parking Safety Improvement ActThis bill directs the Department of Transportation (DOT) to provide competitive grants for projects that provide public parking for commercial motor vehicles and improve the safety of commercial motor vehicle drivers. States, metropolitan planning organizations, tribal governments, and local governments are eligible for these grants.The grants must be used for projects on federal-aid highways or a facility with reasonable access to such a highway or a freight facility.A grant recipient may not charge a fee to a commercial motor vehicle driver to access a public parking facility that is constructed, opened, maintained, or improved with a grant under this program.In providing grants, DOT must determine thatthere is a shortage of commercial motor vehicle parking capacity in the project's corridor;the eligible entity has consulted motor carriers, commercial motor vehicle drivers, public safety officials, and private providers of commercial motor vehicle parking regarding the project;the project will likely increase the availability or utilization of commercial motor vehicle parking, facilitate the efficient movement of freight, or improve highway safety, traffic congestion, and air quality; andthe eligible entity has demonstrated the ability to provide for the facility's maintenance and operation.To the maximum extent practicable, DOT must select grant projects that maximize the geographic dispersion of new commercial motor vehicle parking capacity across the United States.