Reserved powers are those powers reserved for not reserved for- but  granted to the states. The definition of reserved powers: All  powers not expressed in the Constitution â¦are granted to the states  and called reserved powers.
While the vast majority of Interstate highways have no tolls, approximately 2,900 miles of Interstates are tolled in 21 states. These tolled facilities range in length from 500-mile New York State Thruway to tolled sections of I-95 in Delaware and Maryland.
Excluding trackage-rights, U.S. railroads operate 138,945 miles, including 138,518 in the United States. Canadi an railroads have an additional 47 miles in the U.S., making the U.S. network a total of 138,565 miles.