Road dust emission (PM10) is one of the major sources of ambient particulate matter (PM) pollution in many cities. The contribution of road dust to ambient PM10 mass is much higher in cities having dry and wet weather conditions. Several factors contribute to road dust emissions, which includes silt load, traffic characteristics (type, size and weight of vehicles), land use, control mechanism and environmental conditions. In this presentation, the sources of road dust emissions measured at selected urban roads in Chennai were investigated. Chemical characterization of the road dust was carried out. Principal Component Analysis and Positive Matrix Factorization models were used to identify the sources contributing to PM10 emissions. Crustal source was found to be dominating the elemental contributions. Further, dispersion modeling was carried using a modified General Finite Line Source Model for particulate emission form road surface. Model results were validated with measured data. The predicted results were compared with AERMOD predictions and found to be performing better. Further, various control technologies and policies to mitigate road dust emissions were also studied in this research. Performance analysis of two control technologies namely road dust collector and ambient purifier were also carried out.