Assessment of CO and NO2 pollutants concentration in the parking area and its relation to the occupancy percentage in the city of Makassar, Indonesia

One of the sources of air pollution is exhaust emissions from vehicles during transportation activities. Due to the lack of parking spaces and the increase of the vehicles, many people park on the main roads, causing congestion on the side of the main roads. .When the engine is running and the vehicle is on stationed the engine's power is not used to turn the wheels, the combustion quality of the vehicle's engine is not so perfect and the exhaust gas is concentrated on a part of the road. To do, affects the ambient air quality of the location. The purpose of this study was to measure CO and NO2 concentrations using the Impinger Air Sampler. Measurements were taken on the road bodies used for vehicle parking at four locations in Makassar city: Sombaopu street, Nusantara street, Mesjid Raya street, and Jenderal Sudirman street. The data analysis used is a simple linear regression statistic to calculate occupancy. The analytical result obtained for the effect on occupancy and CO concentration was R2= 0.51/51%, p<0.001, we can conclude that the effect of occupancy on CO concentration is significant. We can then conclude that at a value of R2=0.64, p<0.001, the contribution of occupancy to changes in NO2 concentration is also significant. we conclude that the contribution of this predictive model is 68%. Occupancy has a significant impact on CO and NO2 concentrations in curbside parking areas.