Jacksonville Skyway. I has been in operation since 1989 but has been expanded and upgraded several times since then. It has 8 stations, some on both sides of the St. Johns River, and is free to access... no charge to ride.
Of course the photo above does not show the peoplemover, only one of the brightly painted pillars that hold up the elevated monorail. The photo below is a view of the two car train navigating its way through the business district.