This is the data used in the manuscript entitled "Observations and Parameterization of the Effects of Barrier Height and Source-to-Barrier Distance on Concentrations Downwind of a Roadway" published in Atmospheric Pollution Research in 2022. This dataset is associated with the following publication: Francisco, D., D. Heist, A. Venkatram, L. Brouwer, and S. Perry. Observations and parameterization of the effects of barrier height and source-to-barrier distance on concentrations downwind of a roadway. Atmospheric Pollution Research. Turkish National Committee for Air Pollution Research and Control, Izmir, TURKEY, 13(4): 101385, (2022).