Quite a number of historical italian cities, but not only, introduced a bus entry fees to drive in their centers, or to park there. You'll see the main cities' tariff below, but do not hesitate to ask since these 'taxes' are also often changing.
AMALFI
ASSISI
BOLOGNA
CAVALLINO-TREPORTI
FIRENZE
LA SPEZIA
LERICI
LUCCA
MILANO
MONTECATINI TERME
NAPOLI
ORVIETO
PARIGI
PERUGIA
PISA
POMPEI
ROMA
SIENA
TAORMINA
VENEZIA
VERONA
SORRENTO
