School Travel — On-board bus air quality Impact of changing ventilation on a double-decker bus

On-board bus air quality Impact of changing ventilation on a double-decker bus preview

Published Date Tue 01 Aug 2023

Document topic Air quality
Document topic Buses
Document topic Public Transport
Document category Report

Technical study carried out by NIWA for Greater Wellington

Previous monitoring undertaken by Air Matters Ltd1
for Greater Wellington
found elevated levels of CO2 (carbon dioxide) from passenger respiration onboard a sample of in-service buses when passenger numbers were high.
Although there are no guidelines for CO2 levels on public transport, the risk of
viral transmission of respiratory illnesses in indoor areas generally increases as
CO2 levels rise, should infectious people be present.