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.
All highways are maintained by state governments, although they receive federal aid to build and maintain freeways signed as part of the 46,000 mile (75,000 km) nationwide Interstate highway network. A large number of expressways are actually government or privately operated toll roads in many East Coast and Midwestern states.