The common phrase used to describe the Philadelphia metropolitan area. It is in fact, a misnomer, as the Delaware Valley is not a true valley but rather a downward-sloping plain the Delaware River. Heard mainly by residents of South Jersey, Pennsylvania, and sometimes Delaware. Encompasses the counties of Bucks, Montgomery, Chester, Delaware, Gloucester, Burlington, New Castle, Camden and as of 2005, Berks County. Well-known for having some of the worst interstate highway infrastructure among the largest U.S. metropolitan areas, specifically in Pennsylvania.
It is virtually impossible to drive from Reading to Philadelphia without traveling on the overcrowded, prehistoric, Schyulkill Expressway. Welcome to the Delaware Valley.