A remote sensing emissions monitoring programme reduces emissions of gasoline and LPG vehicles.
Environ Res
; 177: 108614, 2019 10.
Article
in En
| MEDLINE
| ID: mdl-31394302
ABSTRACT
Vehicle emissions are a major source of air pollution in Hong Kong affecting human health. A 'strengthened emissions control of gasoline and liquefied petroleum gas (LPG) vehicles' programme has been operating in Hong Kong since September 2014 utilising remote sensing (RS) technology. RS has provided measurement data to successfully identify high emitting gasoline and LPG vehicles which then need to be repaired or removed from the on-road vehicle fleet. This paper aims to evaluate the effectiveness of this globally unique RS monitoring programme. A large RS dataset of 2,144,422 records was obtained covering the period from 6th January 2012 to 30th December 2016, of which 1,206,762 records were valid and suitable for further investigation. The results show that there have been significant reductions of emissions factors (EF) for 40.5% HC, 45.3% CO and 29.6% NO for gasoline vehicles. Additionally, EF reductions of 48.4% HC, 41.1% CO and 58.7% NO were achieved for LPG vehicles. For the combined vehicle fleet, the reductions for HC, CO and NO were 55.9%, 50.5% and 60.9% respectively during this survey period. The findings demonstrate that the strengthened emissions control programme utilising RS has been very effective in identifying high emitting vehicles for repair so as to reduce the emissions from gasoline and LPG vehicles under real driving.
Key words
Full text:
1
Database:
MEDLINE
Main subject:
Vehicle Emissions
/
Environmental Monitoring
/
Air Pollutants
/
Remote Sensing Technology
Type of study:
Prognostic_studies
Country/Region as subject:
Asia
Language:
En
Year:
2019
Type:
Article