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.
I-40 near the New Mexico border. The construction of the 360-mile (579 km) route of I-40 across Arizona took nearly 25 years to complete with the last segment being completed in 1984, much longer than the ambitious goal of finishing by 1972.