ABSTRACT
It will be shown in this chapter that appropriate automatic traffic control systems can enable a single lift, or a group of lifts, to operate at very high efficiency, provided this is matched by high performance, reliable, electromechanical equipment. This chapter will deal with the traffic control of single and multiple lifts, by presenting a classical view. The ideas developed before the era of the digital computer were ingenious and were implemented by relays, without the benefit of Boolean algebra.1 Many of the ideas are still valid today and have formed the basis of modern digital computer based traffic control systems. Their study here is illuminating.
