A Brisbane Tunnel Study to Validate Australian Motor Vehicle Emission Models

Paper #:
  • 2015-01-0058

Published:
  • 2015-03-10
Citation:
Smit, R. and Kingston, P., "A Brisbane Tunnel Study to Validate Australian Motor Vehicle Emission Models," SAE Technical Paper 2015-01-0058, 2015, https://doi.org/10.4271/2015-01-0058.
Affiliated:
Pages:
8
Abstract:
Reliable motor vehicle emission predictions are needed to ensure sound policy decisions. This study reports on a comparison between measured in-tunnel fleet emissions and predictions made with two new Australian vehicle emission software programs (COPERT Australia and PΔP) for one air pollutant: nitrogen oxides (NOx). Measurements were taken from a 6.8 km tolled motorway tunnel that links several major roads in Brisbane, Australia. The validation study suggests that modelled vehicle emissions of NOx are similar to those measured in the tunnel with a prediction error less than ±25% for both light-duty and heavy-duty vehicles. A possible reason for the difference is a suspected younger and cleaner fleet in the tunnel as compared with the Queensland average fleet. Further analysis of license plate information is anticipated to verify this.
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