 Interstate 476 (locally referred to as the Blue Route) traverses Delaware County, bypassing the city to the west and serving the city's western suburbs, as well as providing a link to Allentown and points north.Interstate 276 (the Pennsylvania Turnpike's Delaware River extension) acts as a bypass and commuter route to the north of the city as well as a link to the New Jersey Turnpike and New York City.The Delaware River Port Authority operates four bridges in the Philadelphia area across the Delaware River to New Jersey