UPenn’s Megan Ryerson, an expert in airport infrastructure planning, urges policymakers to consider infrastructure’s optimal use.  “I think we have a very imbalanced system of airport and overall city infrastructure. We have too much where we don’t need it and not enough where we need it,” says Ryerson, an assistant professor in PennDesign. “We need to take a hard look, region by region, about what places need… I really like to think about our airports as a system rather than independent cities that compete for service,” she adds. “We don’t have a lack of infrastructure; we have a lack of infrastructure in the way the networks are structured currently.”