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This research combines field data and analytical approach into spatially map Air pollution levels due to traffic movements, vehicle speeds and grades of roads at relatively high traffic volumes signalized intersections in Amman; capital of Jordan . The study was conducted by collecting traffic and air pollution data at twelve locations in four streets, each street located in a different zone. Also data were collected at three different highly congested traffic periods. The highest air pollution level was measured at 7th circle in Abdullah Goshah street, where was the maximum Average traffic volume. And the least air pollution level of the studied areas was at Anas Bin Malek Street so that it can be an acceptable residential area. Results showed clearly that air pollution levels reach maximum values at or near the traffic signals and decrease gradually when there is an increase in the distance from signals. Also, increasing in road gradients leads to a decrease in speed of vehicles, this leads to an increase in the pollutants concentrations. The highest air pollution concentrations were 0.7, 0.6, 9.9, and 0.6 (in ppm) of NO2, SO2, CO and SPM respectively. The R-square value, square of relative coefficient, of the relationships between NO2, SO2, CO & SPM concentrations and traffic volume were about: 0.9135, 0.8822, 0.8977, and 0.8934 respectively. It is seen that traffic flow has the highest impact on SO2, NO2, CO & SPM concentrations. This study has shown that the levels of these pollutants are above the recommended levels World Health Organization (WHO) in most parts of the studied areas, indicating a need for a regular air quality monitoring, traffic management system and reliable strategies for keeping pollution caused by harmful chemicals under safe level have to be developed and used routinely.

Integration of GIS, Traffic Volume, Vehicular Speed and Road Grades Related-Air Pollution in Amman