The city also boasts the postmodern Humana Building and an expanding Waterfront Park which has served to remove the former industrial appearance of the riverfront.The airport is located approximately 6.5 miles (10.5 km) south of the downtown area, and easily connected to most parts of the city by three Interstate Highways, maximizing its accessibility.Another major business district is located in the more suburban area east of the city on Hurstbourne Parkway.The Louisville City Hall largely follows earlier architectural styles, mainly French Empire.In 2003, Bill Dakan, a University of Louisville geography professor, said that the West End, west of 7th Street and north of Algonquin Parkway, is "a euphemism for the African-American part of town" although he points out that this belief is not entirely true, and most African Americans no longer live in areas where more than 80% of residents are black[clarify].The nearest to downtown, as well as the wealthiest in terms of average income, is Mockingbird Valley, and the two most prominent and oldest Eastern Jefferson County cities are Anchorage and Glenview.There are also plans to use the existing (but closed) vehicle lanes on the K and I railroad bridge over the Ohio River as a pedestrian sidewalk to connect Louisville's Riverwalk Trail to a planned 7-mile (11 km) greenway on the Indiana side which will connect New Albany, Clarksville and Jeffersonville.