A charge or fee for use of an improved waterway. Possible types of charges include: fuel taxes, lockage fees, segment tolls, and licensing of floating equipment.
(TNDOT1)
A fee charged to users for goods and services provided by the federal, state and local governments. User charges, either directly or indirectly, are paid on a periodic or occasional basis with license fees and excises. User charges are also paid at the time infrastructure services are consumed with the payment of fuel taxes and tolls.
(BTS3)