Here the ratio is 1 elevator for every 136.5 units. Not great, but not as bad as we've seen in some other applications as of late.
I believe we need elevator service standards , with a formula that takes into account
- how many suites/bedrooms
- number of floors the elevators could be called to
- whether or not there is a section of the building skipped and therefore travel time (eg serving floors 1 and then 30 through 60)
- the capacity of the elevator
- its speed
- how advanced the origin/destination dispatch technology is
- and how many other elevators there are in the building (being mindful of reliability, meaning how often one might go out of service).
All of those factors would have to be weighted, some experimentation required, to come up with something indicative of appropriate service levels. It's not just a matter of convenience (although I don't want to undervalue convenience for people stuck having to wait for elevators every day of their lives — that's a major quality of life issue in an ever increasingly high-rise city like this) but also of safety.
Put some statisticians on this, come up with a minimum standards formula, and require that buildings have appropriate capacity in their system.
With improvements in elevator origin/destination dispatch technology,, speeds, etc, obviously more suites can be served than by older elevators, but how many are needed? Will 1 elevator per 136.5 suites be sufficient if they're advanced? We don't know.
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