In the middle of the 19 th century, the invention of a safety device that prevented elevators
from falling enabled the construction of tall buildings and skyscrapers. In the middle of the 20 …

The evaluation of the round trip time (τ) still forms the basis for the design of elevator traffic
systems. The elevator round trip time is the time taken for the elevator to complete a full cycle …

Lift traffic design can employ calculation or simulation methods. Calculation can be split into
main categories: analytical equation-based methods and numerical methods. Simulation …

A two dimensional elevator traffic system that moves on the façade of large buildings is
presented in this paper. The building is assumed to have N floors and M rooms on every …

The idea of multicar operation within one hoistway is not new. Two-car systems are currently
available on the market, whereby the two cars travel with restricted independence because …

A previous paper introduced the concept of the HARint plane, which is a tool to visualise the
optimality of an elevator design. This paper extends the concept of the HARint plane to the …

The round trip time is the basis for designing elevator systems. There are a number of
different methods for calculating the round trip time, whether analytical or numerical. As the …

Today, although elevator companies typically have their own elevator simulation and
analysis tools, these remain inaccessible to the public due to commercial concerns and …

Elevator traffic system design has been traditionally based on rules of thumb and the
designer's judgement and expertise. This is especially true for high-rise buildings. This …

For a long time, there was no action that a group controller could take during incoming traffic
conditions other than returning the elevators back to the main entrance and opening their …