en.wikipedia.org/wiki/Hitchhiking

The sentence is inaccurate because it treats several states as blanket exceptions where hitchhiking is illegal statewide.

• Wyoming is no longer one of those exceptions. In 2013, Wyoming enacted S.F. No. 0029, explicitly described by the legislature as “eliminating prohibition on soliciting rides on highways.” The current Wyoming statute section on soliciting on streets and highways no longer mentions rides; it prohibits soliciting employment, business or contributions from vehicle occupants, not soliciting a ride.
• New York Vehicle and Traffic Law §1157 says “No person shall stand in a roadway for the purpose of soliciting a ride”. That is a roadway-location restriction, not a blanket statewide prohibition on hitchhiking.
• Pennsylvania 75 Pa.C.S. §3545 likewise says “Stand on a roadway for the purpose of soliciting a ride” is prohibited. Again, that is narrower than saying hitchhiking is illegal in the state.

So the article's count and exception list are wrong as written: at minimum, Wyoming should not be listed as a state where hitchhiking is illegal, and New York and Pennsylvania are mischaracterized as blanket bans rather than roadway restrictions.