Sicily
Sicily is the largest island in the Mediterranean Sea and an autonomous region of Italy.
People in Sicily are passionate and friendly. Really friendly! They can invite you on a cafè or they may want to touch your private body parts. There are not many highways in Sicily and waiting time on the road is between 10 minutes and 2 hours. Sicily is small and there aren't many highways, so it is easy to find spot for hitchhiking.
South towards Agrigento
About 10-12 away from Palermo there is national road S121 or N121. Close to city the road is narrow, so there is no place to stand. I had to found more space, and so it is marked on the map. [1]
Hitchhiking In
It is possible to hitchhike on the island(it means you may not need to buy a ferry ticket), if you hitchhike somewhere before Villa San Giovanni(I was 200km) with sign Sicily. But don't worry ferry ticket costs for footpassenger 1 euro and 50 cents.
Public Transport
It is possible to take buses without ticket and have long rides out of the city.
Other Useful Info
Traffic in Sicily is crazy.