20 mph Pilot Study: Hunter Mill District
20 mph Pilot Study: Hunter Mill District
The Fairfax County Department of Transportation (FCDOT) is conducting a pilot study to measure the impacts of reduced speed limits on selected roadways throughout the county. The study will include a reduction in the speed limit from 25 mph to 20 mph and will not include any additional physical changes to the roads. Traffic speed and volume data, as well as public feedback, will be collected before and after implementation as part of the pilot evaluation process. The proposed evaluation period is anticipated to run from Summer 2026 through early 2027.
Pilot roads were identified by FCDOT in coordination with the Board of Supervisors (BOS) district offices by considering several factors, with the goal of including a variety of contexts for pilot evaluation. Factors considered include pedestrian activity, presence of sidewalks, marked crosswalks and transit stops, and the proximity of schools and other community uses - along with the Fairfax County Vulnerability Index, which takes into account data such as occupation, education, language, income transportation, health insurance and housing.
As a part of this pilot study, the proposed 20 mph reduced speed limit road segments in the Hunter Mill District include:
- Glade Drive from Sunrise Valley Drive to Reston Parkway
- Pinecrest Road from Glade Drive to South Lakes Drive
Please share your comments on this proposal by completing the survey below. Responses must be submitted by 4:30 p.m., Friday, Dec. 19, 2025. If you would prefer to leave a recorded voice message rather than taking the survey, please call 703-890-5898, and enter the project code 2331.
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