Cities are no isolated microcosms. They rely on being delivered a huge range of products. Cities have been markets, hubs or platforms for exchange with their surroundings, neighboring communities as well as distant ones. Historically, quite many cities have built walls to limit access and strictly regulated access. In the 21st century with low levels of fertility, the demographic pressure to leave the countryside for jobs is less pressing, but many regions face the shrinkage of the countryside’s population. The interrelationship between the urban centers and the rural surroundings has to be studied and addressed due to the far-reaching consequences for both. Transportation into cities needs public infrastructure which can handle the necessary flows and exchanges of people and products. For too many decades we have focused on an either/or cleavage of an apparent dichotomy of urban versus rural. It is about time to correct this bias and take the rural-urban interdependence more systematically into account.
