The additional taxi-out time is a proxy for the average departure runway queuing time on the outbound traffic flow during congestion periods at airports.
It is the difference between the actual taxi-out time of a flight and a statistically determined unimpeded taxi-out time based on taxi-out times in periods of low traffic demand.
When monitoring taxi-out performance at airports, it is important to note that the goal is not to reduce taxi time to the unimpeded reference time - as this could negatively impact on runway throughput - but rather to reduce additional taxi-out time and associated fuel burn to the necessary minimum.
|Column name||Data source||Label||Column description||Example|
|YEAR||Network Manager||YEAR||Reference year||2014|
|MONTH_NUM||Network Manager||MONTH_NUM||Month (numeric)||1|
|MONTH_MON||Network Manager||MONTH_MON||Month (3-letter code)||JAN|
|APT_ICAO||Network Manager||APT_ICAO||ICAO 4-letter airport designator||EBBR|
|STATE_NAME||PRU||STATE_NAME||State in which the airport is located||Belgium|
|FLT_TXO_UNIMP_2||NM/airport||FLT_TXO_UNIMP_2||IFR flights with unimpeded reference time||7290|
|TIME_TXO_UNIMP_2||NM/airport||TIME_TXO_UNIMP_2||Total unimpeded reference taxi-out time in minutes||60081|
|TIME_TXO_ADD_2||NM/airport||TIME_TXO_ADD_2||Total additional taxi-out time in minutes||15175|