Why is it so difficult for farmers operating just outside the city of Chicago to sell to people living there? This was the question that led a team of researchers from the University of Wisconsin–Madison (United States) to explore urban food logistics. Their work, published in a report entitled Regional Food Freight: Lessons from the Chicago Region, unveils the historical trends that led to the consolidation of long distance supply chains at the expense of shorter ones, and the limits of the current food freight system. It calls for a more careful integration of food diversity into urban logistics.