A method of operating a building elevator system within a building having a plurality of floors (80a-80i), the method comprising: controlling a building elevator system comprising a first elevator system having a first elevator car and a second elevator system having a second elevator car , wherein the first elevator car and the second elevator car are configured to serve a plurality of floors (80a-80i); determining one or more sectors for the plurality of floors (80a-80i) in response to at least one of: a time of day, manual input, a density of the down peak traffic, and whether there is simultaneous up peak or inter-floor traffic, the one or more sectors comprising a first sector having a first plurality of floors (80a-80i) and a second sector having a second plurality of floors (80a-80i); assigning the first elevator car to the first sector , the first elevator car being configured to transport passengers from the first sector to a first selected floor of the plurality of floors (80a-80i); and assigning the second elevator car to the second sector , the second elevator car being configured to transport passengers from the second sector to a second selected floor of the plurality of floors (80a-80i); characterized by further comprising: moving the first elevator car through the first sector during a single trip; detecting a number of elevator stops made by the first elevator car during the single trip; and extending the first sector by a selected number of floors (80a-80i) as the first elevator car moves through the first sector when the number of elevator stops is less than a selected number of elevator stops. controlling a building elevator system comprising a first elevator system having a first elevator car and a second elevator system having a second elevator car , wherein the first elevator car and the second elevator car are configured to serve a plurality of floors (80a-80i); determining one or more sectors for the plurality of floors (80a-80i) in response to at least one of: a time of day, manual input, a density of the down peak traffic, and whether there is simultaneous up peak or inter-floor traffic, the one or more sectors comprising a first sector having a first plurality of floors (80a-80i) and a second sector having a second plurality of floors (80a-80i); assigning the first elevator car to the first sector , the first elevator car being configured to transport passengers from the first sector to a first selected floor of the plurality of floors (80a-80i); and assigning the second elevator car to the second sector , the second elevator car being configured to transport passengers from the second sector to a second selected floor of the plurality of floors (80a-80i); characterized by further comprising: moving the first elevator car through the first sector during a single trip; detecting a number of elevator stops made by the first elevator car during the single trip; and extending the first sector by a selected number of floors (80a-80i) as the first elevator car moves through the first sector when the number of elevator stops is less than a selected number of elevator stops. moving the first elevator car through the first sector during a single trip; detecting a number of elevator stops made by the first elevator car during the single trip; and extending the first sector by a selected number of floors (80a-80i) as the first elevator car moves through the first sector when the number of elevator stops is less than a selected number of elevator stops. <EOS>