People pay user fees for the use of many public services and facilities. At the
federal level in the US, there is a charge for walking to the top of the
Statue of Liberty, to drive into many
National parks, and to use particular services of the
Library of Congress. States may charge tolls for driving on
highways or impose a fee on those who camp in
state parks. Communities usually have entrance fees for public
swimming pools and meters for parking on local streets. While user fees are a small share of federal and state revenue, they make-up 20 percent of revenues raised in local jurisdictions.
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Fee collected from only those persons who use a particular service, as compared to one collected from the public in general.