"As a side note, the bus stop bench doesn't exist in Savannah and traffic runs the opposite direction around Chippewa Square."
from IMDB
"The park bench that Tom Hanks sits on for much of the movie was located in historic Savannah, Georgia, at Chippewa Square. The fiberglass bench he sat on has since been removed and placed into a museum to avoid being destroyed by the weather. The church where the feather first falls is about 100 yards just down the street from his bench. The bench is currently held in the Savannah History Museum, Savannah, Georgia."
and
"Chippewa Square, the setting for the famous bench scene, does not actually have any benches on the outside of the square that faces the street, only inside the square. The bench was placed there for that scene only by the production team."