Originally posted by: jagec
Sounds like a waste of money.
First off, it's sort of like putting parachutes on commercial flights...sure, it might save lives, but they crash so seldom it simply isn't worth the enormous cost. Yeah, 9/11 was bad and all, but it was a fluke...skyscrapers are usually very, very safe.
Second, they lower the thing from the roof? If a building's on fire, you'll toast everyone when you pass by the floors engulfed in flames. And you'd better hope you don't cook the cables too much, or they might break. And if there's any sort of debris of pieces of rebar sticking out the side of the building, the car might bind up on them.
Basically, all the disadvantages of normal elevators, with no extra advantages.