Northern Virginia's traffic is shaped by its proximity to Washington
DC and proximity to several important job centers. The world famous
Capitol Beltway (Interstate 495) circles DC like a wheel around a
hub. The Beltway links Northern Virginia's suburban communities such as
Springfield, Kingstowne, Braddock Road and Vienna to the transportation
network. The Beltway generally moves at or above the speed limit most
times and most days.
In Virginia, the Beltway travels from the American Legion Bridge
upriver to the newly-rebuilt Woodrow Wilson Bridge downriver. At each
bridge the Beltway enters Maryland. In Maryland the Beltway loops
around DC creating a complete route.
There are several important job centers along 495, such as Tysons
Corner. Tysons Corner is poorly served by mass transit and there are
regularly scheduled traffic jams at Tysons every rush hour. In
addition, the bridges are choke-points for traffic entering and leaving
Virginia at the American Legion Bridge and at the recently re-built
Woodrow Wilson Bridge.
Traffic into Maryland at the Woodrow Wilson Bridge favors Virginia
commuters heading into Maryland. Commuters from Virginia generally
won't have much trouble reaching Andrews AFB, the Census Bureau, etc.
Conversely, the evening approach to the Woodrow Wilson Bridge backs up
with Maryland residents heading home from jos in Virginia. This problem
should soon be alleviated greatly as the new bridge comes completely online.
The American Legion Bridge serves many Virginia commuters headed for
Rockville, Silver Spring, etc. This burden, coupled with its proximity
to Tysons Corner causes the Beltway to slow during rush hour.
The Beltway loops around DC like a wheel around a hub. Many roads
and rails in the area link to DC like spokes on that wheel. There are
many of these spokes, but in Virginia there are three primary corridors
from DC: I-66, I-395, and US 1 together with the GW Parkway.
66 Corridor and Orange Line
I-66 is HOV only during rush hour, but other routes (such as 50, 29
& 28) parallel the interstate as it approaches DC. Taken as a whole
this road system can carry a tremendous amount of traffic, but it slows
considerably during rush hour.
The 66 corridor is also served by the Orange Line, with Metro stops
in Arlington at Rosslyn, Clarendon, Ballston (and more). The Orange
Line continues through West Falls Church and then into Fairfax County
with a terminal station at Vienna. 66 is used by commuters in Fairfax,
Centreville, Manassas and beyond to the hinterlands.
In addition to the routes mentioned above, outside the Beltway 66 is
supported by the Dulles Tollroad, which links the area to Dulles
Airport and outlying suburbs such as Herndon, Reston and beyond.
I-395
Interstate 395 doesn't have a Metro train service but it carries a
massive load of traffic none-the-less. In addition to its 8 to 10 lanes
of traffic, 395 has an extra 3 lanes of HOV that switch direction
depending on the hour of the day. 395 leaves DC between the Pentagon
and Crystal City (both in Arlington) and on the way out to I-95 and the
Beltway at Springfield, I 395 passes Shirlington, Landmark, East Falls
Church and other neighborhoods.
Traffic on 395 is nearly always heavy but only slows during rush hour.
George Washington Parkway, Rt. 1 and the Yellow & Blue Lines
North of the Key Bridge, the 4 to 6 lanes of the George Washington
Parkway ties into I-495 at the American Legion Bridge. This route
serves Mclean and Northern Arlington County. South of Memorial Bridge,
the George Washington Parkway and US Rt. 1 together only carry 8 to 10
lanes of traffic.
Traffic here is relatively light considering the proximity to the
city, and the fact that US 1 has several traffic lights. This route
follows the Potomac downriver toward the Beltway at the Woodrow Wilson
Bridge.
This route is also supported by the Yellow and Blue Metro Lines.
Taken as a whole, this route serves commuters at Crystal City, Pentagon
City, Del Ray, Old Town, New Alexandria and Mt. Vernon to the city. At
King St, the Yellow and Blue Lines fork with the Yellow Line continuing
toward Mt. Vernon, but ending at Huntington. The Blue Line turns south
toward Springfield with stops at Van Dorn and Springfield.