Intersection Improvement Program


Loudoun County’s Intersection Improvement Program (IIP) addresses traffic safety and operational challenges on roadways within the county. It also identifies cost-effective solutions to enhance safety for all motorists, pedestrians and bicyclists.

Some program highlights:

  • In 2017, the Loudoun County Board of Supervisors established the IIP as a proactive measure to efficiently initiate and implement roadway intersection improvement projects. Previously, these projects were often initiated on an ad-hoc basis in reaction to traffic safety and operational concerns, and were sometimes delayed until funds became available. 
  • To enhance responsiveness in addressing safety concerns, the Department of Transportation and Capital Infrastructure (DTCI) developed a data-driven plan to identify problematic intersections based on incidents and operations.
  • Intersections identified for improvement as part of this program are located along primary or collector roadways in the Countywide Transportation Plan (CTP). CTP roadways are high volume or critical as they allow residents access to schools, public transportation and other areas of interest.
  • Intersection improvement projects are initiated and advanced to design and implementation phases in descending priority order within the County’s Capital Improvement Program (CIP)
  • Funding for intersection improvement projects began in the second half of 2021.

Intersection Projects

Each individual intersection improvement project follows the standard process for project initiation and advancement within the County’s CIP. From start to finish, the estimated timeline for the installation of a traffic signal is three years and a roundabout is five years. This timeline includes the design, land acquisition, utility relocation and construction phases of the project. The Intersection Improvement Program projects currently underway are listed in alphabetical order and are as follows:

Project DescriptionTypeCurrent PhaseFiscal Year Completion*
Algonkian Parkway and Hardwood Forest Drive/ Noble Terrace - Algonkian/ Sterling DistrictNew Traffic SignalDesign2027
Ashburn Farm Parkway and Golden Meadow Circle/ Summerwood Circle - Ashburn DistrictNew Traffic SignalPlanning2029
Ashburn Road and Faulkner Parkway - Broad Run DistrictNew Traffic SignalDesign2027
Ashburn Village Boulevard and Shellhorn Road - Broad Run DistrictSignal ModificationsPlanning2027
Atlantic Boulevard and Century Boulevard - Sterling DistrictSignage and/or Pavement Marking ChangesDesign2026
Claiborne Parkway and Dulles Greenway - Ashburn DistrictNew Traffic SignalDesign2027
Claiborne Parkway and Marshfield Drive - Ashburn DistrictTurn Movement RestrictionsDesign2026
East Church Road and Lincoln Avenue/ Belfort Street - Sterling DistrictRoundaboutPlanning2030
Leesburg Pike and Augusta Drive - Algonkian/ Sterling DistrictContinuous Green-TDesign2028
Leesburg Pike and Cedar Drive - Algonkian/ Sterling DistrictMedian ClosurePlanning2028
Leesburg Pike and Lakeland Drive - Algonkian/ Sterling DistrictSignalized Restricted Crossing U-TurnPlanning2028
Leesburg Pike and North Sterling Boulevard/ Cardinal Glen Circle - Algonkian/ Sterling DistrictContinuous Green-TPlanning2029
Leesburg Pike and Potomac View Road - Algonkian/ Sterling DistrictReconfigure Westbound Turn LanesDesign2027
Loudoun County Parkway and Gloucester Parkway - Broad Run/ Sterling DistrictSignal ModificationsPlanning2027
Old Ox Road and Douglas Court - Sterling DistrictTurn Movement RestrictionsDesign2026
Old Ox Road and Dulles Summit Court - Sterling DistrictReconfigure Westbound Turn LanesDesign2026
Pacific Boulevard and Business Court/ Indian Creek Drive - Sterling DistrictNew Traffic SignalPlanning2027
Pacific Boulevard and Relocation Drive - Sterling DistrictNew Traffic SignalPlanning2029
Sterling Boulevard and Glenn Drive - Sterling DistrictNew Traffic SignalDesign2027
Sterling Boulevard and Shaw Road - Sterling DistrictSignal ModificationsPlanning2027
Sterling Boulevard and W. Laurel Avenue - Sterling DistrictNew Traffic SignalDesign2028
Sterling Boulevard and Williamsburg Road/ Chase Heritage Circle - Sterling DistrictTurn Movement RestrictionsDesign2027
Sugarland Road and East Church Road/ East Frederick Drive - Sterling DistrictMini RoundaboutDesign2028
Tall Cedars Parkway and Nations Street - Dulles DistrictTurn Movement RestrictionsDesign2026
Waxpool Road and Ashburn Road - Broad Run/ Little River DistrictNew Traffic SignalDesign2026

* Estimated fiscal year (FY) date of completion. Loudoun County's FY runs July through June. For example, July 2023 is the start of FY 2024.

Completed  Projects

  • Ryan Road and Cotton Grass Way - Little River District (Completed FY2022)
  • Tall Cedars Parkway and Edgewater Street - Dulles District (Completed FY2023)
  • Tall Cedars Parkway and Elk Lick Road - Dulles District (Completed FY2023)
  • Waxpool Road and Shellhorn Road - Broad Run/Little River District (Completed FY2023)

Project Resources

The following resources provide more information about Loudoun County Capital Projects: