Transition Area Alliance

This table is from the Kimley-Horn analysis of the impact of the draft comprehensive plan on Loudoun traffic. It assumes that all of the roads in the Countywide Transportation Plan are funded and built, including a Rt 50 alternate through Dulles Airport. This particular table only shows the roads most impacted by the Planning Commission changes to the Envision Loudoun draft. A number of other roads were already identified as stressed, per their analysis of the Envision Loudoun plan. Quoting from the analysis:

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"Review of the network's volume to capacity ratios shows the following roadway segments experience a volume demand that exceeds or is approaching capacity:

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• Route 9 west of Hillsboro and east of Route 287

• Route 287 north of Purcellville and through Lovettsville

• US Route 15 between Montresor Road and the Maryland Line

• Route 7 east of Route 690

• US Route 50 near Aldie

• US Route 15 is projected to have capacity constraints south of US Route 50 into Prince William County.

• US Route 50 and Braddock Road between US Route 15 and Northstar Boulevard. With little improvements proposed to these routes, both experience capacity constraints

• Gum Spring Road at the Prince William County line reaches capacity.

• Northstar Boulevard between Braddock Road and Shreveport Drive approaches capacity.

• Trail head Drive approaches capacity both north and south of Route 50.

• Route 7 approaches capacity from Belmont Ridge Road to the Fairfax County Line. However, capacity remains available on parallel routes such as the Dulles Greenway, Gloucester Parkway, Riverside Parkway, and Russell Branch Parkway.

• Connections around the future Metrorail Stations and the surrounding Urban Policy Area experience capacity constraints in the PM peak. Some of these roadways include Loudoun County Parkway, Metro Center Drive, Barrister Street, Route 606, and Moran Road.

• The capacity constraints present on Route 28 and the intersecting roadways such as Waxpool Road, Gloucester Parkway, and Route 7 suggest that travel demand may be avoiding the Dulles Greenway.

• Route 50 and Route 50 Collector Road east of Tall Cedars Parkway reaches or exceeds capacity, but this is likely due to constraints to the network in Fairfax County."

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Clearly, the consultant's low-key conclusion that "a global comparison of the two networks (Envision Loudoun vs Planning Commission) shows that the
change in congestion is nominal," read by itself, could cause someone to miss the point. The new plan should work on solving our traffic problems. Surely the Board of Supervisors won't be satisfied with "they won't get that much worse."

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A broader discussion of the three models underlying the draft plan (Housing Demand, Fiscal Analysis, and Traffic) can be found on our Archive page. See "Loudoun's Models."

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