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Big Change Coming in Tysons Traffic Pattern

Tysons interchange.jpg
Map shows Dulles Rail work zone in Tysons Corner, with upcoming lane and ramp shifts.

Where: The intersection of Routes 7 (Leesburg Pike) and 123 (Chain Bridge Road) in Tysons Corner.

What: Lanes will shift and the ramp from westbound Route 7 to southbound Route 123 will be relocated

When: Mid-October, but some prep work will occur early in the month.

Impact: As this change develops, it's bound to slow traffic (slow it more) as drivers try to figure out what they need to do.

Drivers using westbound Route 7 will see the right lane -- the one they now use to reach the ramp that goes to southbound Route 123 -- disappear as they approach the Route 123 overpass across Route 7. That ramp entrance is being moved about 120 feet west. The new look -- which you can see in the map up top -- will require drivers to make a much sharper right turn from a traffic lane to enter the southbound ramp. It's the new yellow vs. the old red line on the map.

The first things to watch for will be lane shifts in both directions of Route 7 between Route 123 and Marshall's Drive (the entrance to Marshall's shopping center). Paving and shifts of the eastbound lanes should be done by Oct. 8. No work will be done from noon on Friday, Oct. 9, till noon on Tuesday, Oct. 13. That's the Columbus Day weekend. (Maybe you'll want to get your Christmas shopping done early.)

Why: This work is part of the Dulles Rail project. As the new Metrorail line heads west along the north side of Route 123, it will swing right, into the median of Route 7 before heading up to the median of the Dulles Access Road. In the area where the ramp will close, a short tunnel will be built to get the trains through the natural high point of Fairfax County.

By Robert Thomson  |  September 30, 2009; 9:09 AM ET
Categories:  Commuting , Congestion , Construction , Driving  | Tags: Dr. Gridlock, Dulles Rail, Metrorail, Tysons  
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