The brand new Battlefield Parkway interchange is open for business in Loudoun County, and it’s creation is expected to result in big drops in travel times for the almost 100 thousand cars that use Route 7 on a daily basis. (Mike Murillo/WTOP) The brand new Battlefield Parkway interchange is open for business in Loudoun County, Virginia, and its creation is expected to result in big drops in travel times for the almost 100,000 cars that use Route 7 on a daily basis. “It’s really an amazing accomplishment of many people over many years,” said Bill Cuttler, the Northern Virginia district construction engineer for the Virginia Department of Transportation.