Phoenix Study
Phoenix Traffic and Mobile Data. 

This dataset is associated with the following publication:
Baldauf , R., V. Isakov , P. Deshmukh, and A. Venkatram. Influence of Solid Noise Barriers on Near-Road and On-Road Air Quality.   ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, USA, 129: 265-276, (2016).