RSG Senior Engineer Erica Wygonik co-authored the article, “Evaluating the Impacts of Density on Urban Goods Movement Externalities,” which was recently published in the Journal of Urbanism. Compared to previous research on the subject, this article examines the impacts of replacing passenger travel for shopping with delivery services over a broad set of externalities (VMT, CO2, NOx, and PM10) in both urban and rural communities.