The Transform 66 Project is adding 18 miles of trail along and near I-66, providing new ways for people to move in the I-66 corridor. The new shared-use path forms the central part of the new 66 Parallel Trail in Fairfax County, running along the I-66 corridor from Dunn Loring to Centreville. The trail will open in phases beginning in May 2023 and continuing through the summer. (See opening schedule and status below)
VDOT and its private partner, I-66 Express Mobility Partners (I-66 EMP), worked closely with Fairfax and Prince William counties and their trail plans to develop new and improved trail facilities as part of the overall Transform 66 Outside the Beltway Project. In addition to the shared-use path along I-66, the project has improved and built first-time connections across I-66 at many interchanges and overpasses including Route 123 (Chain Bridge Road), Jermantown Road, Route 50, and Route 28.
Opening Status and Timeline
Trail sections began opening in May and will continue through summer 2023, as final work and inspections are completed. Remaining work varies by section and includes paving, lighting of culverts, sign installation, and other punch list items. The below table will be updated as additional anticipated opening dates are available.
Shared-Use Path Opening Status (Updated August 9, 2023)
Between Vienna Metrorail Station and Cedar Lane, including tunnel under Nutley Street
Between Blake Lane and Route 123
Through the Nutley Street Interchange/across I-66
Between Route 123 and Jermantown Road
|Through the Route 123 Interchange||October|
|Between Cedar Lane and Gallows Road||October|
|Between Jermantown Road and Route 50||October|
|Between Fairfax County Parkway and Stringfellow Road||October|
|Between Stringfellow Road and Route 28||October|
|Through the Route 28 Interchange and along Braddock Road||October|
|Bobann Trail (south of I-66 Stringfellow Road and Wharton Lane)||October|
|Through the Route 50 Interchange||Spring 2024 (pending Fairfax County project in Random Hills Park)|
I-66 Trail Plans and Design
The path is 10-feet wide, with a two-foot-wide shoulder on each side, in accordance with VDOT standards. In certain space-constrained locations the trail width is reduced to eight feet with shoulders.
The project team has coordinated with bike advocacy groups, homeowner associations, and local residents to develop and refine the design plans, which were presented at public hearings held in November 2017. VDOT received many comments opposed to placing the trail on the residential side of noise barriers in locations where the trail passes near homes. Those comments led to a contract requirement to locate the trail on the highway side of noise barriers in areas adjacent to homes. VDOT also received many comments with concerns about placement of the trail alongside the interstate, which led to design changes around the type of barrier that would be adjacent to the trail.
Between Route 29 in Centreville and Gallows Road, approximately three miles of trail is adjacent to the interstate and approximately eight miles of trail is behind the noise barrier or with no noise barrier. Much of the trail alongside I-66 is higher or lower than the adjacent roadway.
Access to the trail is provided about every half mile. The 66 project team has worked with local agencies to identify the best location of each access point. Preliminary access points for the trail between Route 29 and Gallows Road are shown by green arrows in the Conceptual Trail Plan (see map below).
The shared-use path in Fairfax County has been named the 66 Parallel Trail, incorporating and connecting to parts of the county’s existing and planned trail network.
Conceptual Trail Plan in Fairfax County:
In coordination with Prince William County, a future trail to be constructed by others has been proposed on parallel roadways. Two segments of this trail will be adjacent to the park and ride lots at University Boulevard and along Balls Ford Road which were constructed as part of the Transform 66 Project.
Conceptual Trail Plan in Prince William County:
New bridges over I-66 better accommodate cyclists and pedestrians, while connecting existing and planned bike routes. Improvements include on-road bike lanes, off-road shared-use path, and elimination of at-grade crossings at some interchanges. The project has also built first-time pedestrian crossings of I-66 at Route 123, Jermantown Road, Route 50, and Route 28, as well as new grade separated crossings of Route 28 at Poplar Tree Road and Braddock Road/Walney Road for vehicles and pedestrians.
Other Nearby Trail Projects
Additional nearby trail projects are part of building out the trail network along I-66. These other projects include:
Vienna Metrorail Station Bicycle and Pedestrian Improvements
VDOT and Fairfax County are working jointly to improve bicycle and pedestrian access in the area of the Vienna Metrorail Station. A series of improvements along Country Creek Road/Virginia Center Boulevard between Sutton Road and the ramp to westbound I-66, and along Sutton Road between Blake Lane and Country Creek Road are planned, with construction anticipated to begin in late 2024 and be completed in early 2026. Construction of interim improvements including cycle track, bike lanes, and high visibility crosswalks opened in May 2023 to coincide with the opening of adjacent Transform 66 Project shared-use path sections. Learn more about these improvements in this presentation. Learn more about this multi-agency project here.
Post Forest Drive and Random Hills Road Shared-Use Paths
Existing sections of sidewalk along Post Forest Drive and Random Hills Road will be upgraded to 10-foot-wide shared-use paths. Crosswalks will be added and curb ramps improved in this stretch located between Monument Drive and Route 608 (West Ox Road) on the south side of I-66 to benefit people making short trips in the neighborhood and longer trips along the I-66 Parallel Trail. Construction is planned to begin in 2025. Learn more here.
W&OD Trail Realignment at Idylwood Park
The Washington & Old Dominion Trail (W&OD Trail) near Idylwood Park (between Virginia Lane and the trail bridge over I-495) in Falls Church has been permanently shifted to a new alignment in conjunction with noise wall construction as part of the Transform 66 Project.
Some construction activities require trails and sidewalks in the project corridor to be closed for varying periods. This includes trails along the corridor as well as bridges and underpasses that cross I-66. Providing safe alternate routes is a priority for the project team. Detours will be clearly marked to help pedestrians, cyclists, and others remain mobile.
Sidewalk closures will alternate sides during construction of new bridges. Follow signs.
|Current Trail and Sidewalk Closures (Updated July 19, 2023)|
|Gallows Road over I-66 – Dunn Loring||Through summer 2023||Sidewalk is open on the east side while trail connections on the west side of Gallows Road are completed. Follow signs.|
|Nutley Street over I-66||Through summer 2023||
Sidewalk is closed on the east side of Nutley Street between Virginia Center Boulevard/Marshall Road and I-66 to allow construction of new sidewalk and Nutley Street. Use the west side of Nutley Street and follow detour signs.
|Vaden Drive over I-66 (also the W&OD/City of Fairfax Connector Trail) - Vienna||Through summer 2023||Sidewalk on the west side has opened and is the detour route while finishing work is completed on the shared-use path on the west side.|
|Jermantown Road north of I-66 - Oakton||
Through summer 2023
|Sidewalk on east side of the new bridge has opened and is the detour route while finishing work is completed on the west side of the bridge.|
|Waples Mill Road over I-66 - Oakton||Through summer 2023||Shared-use path has opened on the west side connecting to Valley Road. Construction continues on sidewalk on the east side.|
|Monument Drive between I-66 and Government Center Parkway||Through summer 2023||Shared-use path on east side of Monument Drive between I-66 and Government Center Parkway will be shifted to a temporary path between barriers.|
|Fair Lakes Parkway between Fair Lakes Shopping Center and Roger Stover Drive||Through summer 2023||The sidewalk along eastbound Fair Lakes Circle is closed for construction of new shared-use path. Use the opposite side.|
|Bobann Trail along I-66 East - Centreville||
Through summer 2023
Trail is closed while being reconstructed. Detours use Centreville Farms Road, Leland Road, and Pickwick Road.
|Trail Map – Fairfax County|
|Trail Map – Prince William County|
|Presentation to Fairfax Alliance for Better Bicycling (Feb. 28, 2019) - PDF, 23MB|
|Presentation to Fairfax Alliance for Better Bicycling (Sep. 16, 2020) - PDF, 5MB|
|Presentation to Fairfax Alliance for Better Bicycling (July 21, 2021) - PDF, 4.9MB|
|Presentation to Fairfax Alliance for Better Bicycling on Vienna Metro Area Trail (July 21, 2021) - 715KB|
|Presentation to Fairfax Alliance for Better Bicycling (March 15, 2023) - 5MB|