Amount of Greenhouse Gas Emissions from Public Transportation Services Case Study: Prince of Songkla University, Hat Yai Campus

Abstract

The objective of this research is to study the amount of greenhouse gas emissions and to look for the way to reduce the amount of greenhouse gas emissions from public transportation services, Prince of Songkla University, Hat Yai Campus. There are 15 of public transportation vehicles which consist of 11 electric vehicles, 4 diesel vehicles which provide vehicle services in 3 routes: Line 1 blue, Line 2 red and Line 3 green. The study results showed that total greenhouse gas emissions of public transportation vehicles were 54,929 kgCO2eq/ year. The greenhouse gas emissions were 21,566 kgCO2eq/ year, 1,208 kgCO2eq/year and 14,155 kgCO2eq/year for Line 1 blue, Line 2 red and Line 3 green, respectively. The average of greenhouse gas emission of electric vehicles was 2,251 kgCO2eq/vehicle/year while the average of greenhouse gas emission of diesel vehicles was 7,543 kgCO2eq/vehicle/year. The comparison between electric vehicles and diesel vehicles, it was found that the diesel vehicles emitted more greenhouse gases than the electric vehicles about 5,292 kgCO2eq/vehicle/year. The greenhouse gases emitted from diesel vehicles more than 3.35 times of the electric vehicles. Presently, Prince of Songkla University uses both types of public transport vehicles. In the future, if Prince of Songkla University changes 4 diesel vehicles to electric vehicles. As a result, the public transportation vehicles of PSU can reduce the greenhouse gas emission about 21,168 kgCO2eq/year (30% of greenhouse gas emission reduction).