Section 4 - Washington, DC.

The zone adjacent to and commercially a part of Washington, DC, within which transportation by motor vehicle, in interstate or foreign commerce, not under a common control, management, or arrangement for a continuous carriage to or from a point beyond the zone is partially exempt from regulation under section 203(b)(8) of the Interstate Commerce Act (49 U.S.A. 303(b)(8)) includes and it is comprised of all as follows:

Beginning at the intersection of MacArthur Boulevard and Falls Road (Maryland Highway 189) and extending northeasterly along Falls Road to its junction with Scott Drive, thence west on Scott Drive to its junction with Viers Drive, thence west on Viers Drive to its junction with Glen Mill Road, thence northeast on Glen Mill Road to its junction with Maryland Highway 28, thence west on Maryland Highway 28 to its junction with Shady Grove Road, thence northeast on Shady Grove Road approximately 2.7 miles to Crabbs Branch, thence southeasterly along the course of Crabbs Branch to Rock Creek, thence southerly along the course of Rock Creek to Viers Mill Road (Maryland Highway 586), thence southeasterly along Viers Mill Road approximately 0.3 mile to its junction with Aspen Hill Road, thence northeasterly along Aspen Hill Road to its junction with Brookeville Road (Maryland Highway 97), thence southeasterly along Brookeville Road to its junction with Maryland Highway 183, thence northeasterly along Maryland Highway 183 to Colesville, Md., thence southeasterly along Beltsville Road to its junction with Powder Mill Road (Maryland Highway 212), thence easterly over Powder Mill Road to its junction with Montgomery Road, thence northeasterly along Montgomery Road, approximately 0.2 mile, to its junction with an unnumbered highway extending northeasterly to the north of Ammendale Normal Institute, thence along such unnumbered highway for a distance of about 2.2 miles to its junction somewhat north of Virginia Manor, Md., with an unnumbered highway extending easterly through Muirkirk, Md., thence along such unnumbered highway through Muirkirk to its junction, approximately 1.8 miles east of the Baltimore and Ohio Railroad, with an unnumbered highway, thence southwesterly along such unnumbered highway for a distance of about 0.5 mile to its junction with an unnumbered highway, thence southeasterly along such unnumbered highway through Springfield and Hillmeade, Md., to its junction with Defense Highway (U.S. Highway 50), thence southwesterly along Defense Highway approximately 0.8 mile to its junction with Enterprise Road (Maryland Highway 556), thence southerly over Enterprise Road to its junction with Central Avenue (Maryland Highway 214), thence westerly over Central Avenue about 0.5 mile to its crossing of Western Branch, thence southerly down the course of Western Branch to Maryland Highway 202, thence westerly approximately 0.3 mile along Maryland Highway 202 to its junction with White House Road, thence southwesterly along White House Road to its junction with Maryland Highway 221, thence southeasterly along Maryland Highway 221 to its junction with Maryland Highway 4, thence westerly along Maryland Highway 4 to the boundary of Andrews Air Force Base, thence south and west along said boundary to Brandywine Road (Maryland Highway 5), thence northwesterly along Maryland Highway 5 to its junction with Maryland Highway 337, thence southwesterly along Maryland Highway 337 to its junction with Maryland Highway 224, thence southerly along Maryland Highway 224 to a point opposite the mouth of Broad Creek, thence due west across the Potomac River to the west bank thereof, thence southerly along the west bank of the Potomac River to Gunston Cove, thence up the course of Gunston Cove to Pohick Creek, thence up the course of Pohick Creek to Virginia Highway 611, thence southwesterly along Virginia Highway 611 to the Fairfax-Prince William County line, thence along said county line to Virginia Highway 123, thence northerly along Virginia Highway 123 to its junction with Virginia Highway 636, thence northeasterly along Virginia Highway 636 to its junction with Virginia Highway 638, thence northwesterly along Virginia Highway 638 to its junction with Virginia Highway 620, thence westerly along Virginia Highway 620 to its junction with Virginia Highway 655, thence northeasterly along Virginia Highway 655 to its junction with U.S. Highway 211, thence westerly along U.S. Highway 211 to its junction with Virginia Highway 608, thence northerly along Virginia Highway 608 to its junction with U.S. Highway 50, thence westerly along U.S. Highway 50 to the Fairfax-Loudoun County line, thence northeasterly along said county line to its intersection with Dulles International Airport, thence along the southern, western, and northern boundaries of said airport to the Fairfax-Loudoun County line (at or near Dulles Airport Access Road), thence northeasterly along said county line to its junction with Virginia Highway 7, thence southeasterly along Virginia Highway 7 to its junction with Virginia Highway 193, thence along Virginia Highway 193 to its junction with Scott Run Creek, thence northerly down the course of Scott Run Creek to the Potomac River, thence due north across the river to MacArthur Boulevard to its junction with Maryland Highway 189, the point of beginning.