摘要:AbstractThis study focuses on one of the emissions emitted by motor vehicles, namely Carbon Monoxide (CO) which is one of the parameters of air pollutants that has highest percentage of pollution generated from transportation activities. In order to meet the target of national movement in reducing the volume of CO, this study attempts to estimate the volume CO in Surabaya City. The secondary data collected are used for preliminary analysis in estimating the volume of the CO. The results are expected to give general picture of the severity level of air quality in Surabaya.