Lift Traffic Analysis

What is a Lift Traffic Analysis?

A lift traffic analysis studies the performance of a group of lifts, based on assumptions about the expected traffic situation.

The main performance measurements are quantitative (handling capacity) and qualitative (waiting time).

Handling Capacity is expressed as the percentage of the building population the group of lifts can cope with over a given time period (usually in 5 minutes).
Waiting time is exactly that. It is the waiting time for a lift to arrive in response to pressing a call button.
The lift traffic analysis is based on assumptions about the flow of the building population e.g. when/where do they enter/leave and are there facilities e.g. restaurants, gyms in the buildings that have an strong effect on the usual passenger flow.

The more accurate the passenger movement can be modelled, then the more accurate will be the results of the traffic analysis. Once these are modelled an accurate calculation of the lift performance can be made.

The outputs of a traffic analysis will give an accurate indication of the quality and quantity of lift service provided i.e. what the waiting times are and what percentage of the building population can be transported by the lifts in a given time period.

When can a Traffic Analysis be used?

A lift traffic analysis is fundamental in the design of new buildings to identify the size, speed and capacity of lifts needed to provide the levels of service required.

It is one the requirements for obtaining BREEAM credits for lifts

For existing buildings a lift traffic analysis can be used to predict the impact on the lift service of changes in a building’s population and/or configuration e.g. to get the most out of buildings the population is often increased and sometimes features are added to or changed in buildings (restaurants, gyms) that can affect the flow of people.

Useful Links

Service – Feasibility Study

Service – Data Logging

Topic – BREEAM Credits for Lifts and Escalators

Topic – Increasing the population of your building

Topic – Hall Call Allocation or Destination Control Systems

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