[praptak]

[...] most of these urban systems are designed to run over accessible areas, and no higher than 2-4 storeys from the ground, so if rescue is needed Fire Department crews can use standard equipment to reach the stranded gondolas.

This sounds like a design challenge for a built in rescue system. Rope ladders, only somehow made much safer.

[JoeAltmaier]

Chutes can go that far? You sit down, and scoot into a hole int he floor - the tube-like chute extends from the car to the ground and provides drag