Lift Bus

One thing that strikes me is that a lot of the waiting for a lift is because they're moving about at random rather than in a sensible patern. Oh a regular lift will always have it's place but in large buildings there are always one or two floors that see more traffic. So, why not make at least one shaft where the lift doesn't stop on request, but makes a regular circuit stopping off at each floor on the list in turn pausing for a fixed time to let off and take on passengers? It'd save time, as there's no arguments about buttons or which floor to go to next. By servicing the bussiest areas of the building the regular lifts can then be left to cope with those headed to less common destinations.

Another advantage is that with a regular time table at least you can tell at a glance how long you will have to wait for the lift and make up your mind right away if it's worth waiting for or not.