Abstract
Delay-related emission assessments are uncommon at most airports. ICAO provides estimation methods, which are complex and challenging to implement at scale. This paper proposes a method for estimating air pollutant emissions from aircraft taxiing delays.
Taxi time data from a selected Australian airport were analysed to estimate delays and their associated emissions. The proposed method, incorporating engine-specific unimpeded taxi times, provides an alternative to the ICAO method. Emissions from both methods were compared to assess accuracy. Additionally, taxiing delay emissions were evaluated against total taxiing emissions. The percentage differences for CO, NOX, HC, and SOX emissions between the proposed and ICAO methods were less than 15%, confirming the proposed method's validity and accuracy. Additionally, the results demonstrate that approximately 30% of taxiing emissions at the selected airport are due to taxiing delays. This paper provides a valuable contribution to airports and airlines in their need to assess air quality impact and guide future environmental strategies. Accurate quantification of delay-related emissions is critical for enhancing sustainability and informing effective policy decisions.