The number of cities using aerial trams (cable cars) as a means of urban transport is growing. In Cincinnati, the idea of implementing an aerial tram between Over-the-Rhine and Mt. Adams has long been considered. Often times the trams take passengers from low-lying areas to the tops of hillsides, but they are also being used to traverse rivers and more. More from The Guardian:
Cable transport is cost-effective, environmentally friendly, safe and requires little infrastructure. It is particularly suitable for crossing natural obstacles such as rivers or scaling hills, there being no need for expensive engineering work. Over an equivalent distance a cable link costs half as much as a tram line, and though no rival for underground railways in terms of capacity, some models can carry up to 8,000 passengers an hour.