Construction efforts to rehabilitate the George Washing Memorial Parkway (GWMP) are underway between I-495 and Spout Run Parkway. Construction activities will impact drivers and park visitors for the duration of the rehabilitation. View construction updates under Current Construction. The project is anticipated to be completed in late 2025.
Current Construction (Updated February 2024)
I-495 to Route 123
Route 123 Interchange Ramp Weekend Detours Planned Through Early 2024
NPS will close one ramp at a time during the weekend hours at the GWMP and Route 123 interchange through early 2024, weather permitting. Construction activities requiring the ramp closures include select tree removal, drainage installation, and installation of permanent asphalt pavement. Detours will be in place as shown within the closure details. Crews anticipate the following closure sequence:
The ramp from southbound Route 123 to southeast GWMP will be closed during weekends through February to complete activities as shown below:
Once work is complete on the ramp from southbound Route 123 to southeast GWMP, Crews will begin work on the ramp from northbound Route 123 to southeast GWMP. This ramp is anticipated to be closed on weekends through early 2024. Closures include weekends between 7 a.m. – 5 p.m. for drainage installation.
Once work is complete on the ramp from northbound Route 123 to southeast GWMP, crews will work on the ramp from southeast GWMP to southbound Route 123. Construction will take place during the following periods:
Crews will complete the required work sequence at each ramp before moving to the next ramp. All work is weather dependent and this schedule is subject to change.
Route 123 to Windy Run Bridge
A temporary three-lane configuration, with a middle reversible lane, between Route 123 to Windy Run Bridge, remains in effect. The right northbound lane is closed for rehabilitation work, including demolition, excavation activities, drainage installation, and tree removal at the outfalls. This work extends the three-lane configuration from I-495 to just south of Windy Run Bridge.
From Winter 2023 - Fall 2024, both the North Donaldson Overlook and Fort Marcy will be inaccessible from the northbound right lane during non-rush hour times (9 a.m. - 2 p.m.). This configuration extends the existing right lane closure to allow for additional safe work zones for the expedition of rehabilitation work along the northbound shoulder.
Reversible Lane Schedule
Weekday morning rush hour (5:30 a.m. – 9:30 a.m.)
Weekday evening rush hour (2:45 p.m. – 7:15 p.m.)
Weekdays (9:30 a.m. – 2:45 p.m. and 7:15 p.m. - 5:30 a.m.) weekends and major holidays
To increase safety, small physical barriers divide the narrow travel lanes. Commercial vehicles are restricted from the parkway at all times. Signage will direct drivers to the appropriate lanes. Motorists who wish to exit the parkway at the CIA and Route 123 must remain in the right lane. The center lane will be used as a through lane during rush hour for traffic to exit at either end of the parkway at I-495 or Spout Run Parkway. Northbound motorists who wish to exit the parkway onto I-495 into Maryland must remain in the right lane.
During non-rush hour periods, weekends, and holidays, the center reversible lane will be closed, and motorists can expect two travel lanes: one travelling northbound and one travelling southbound.
The NPS expects the three-lane traffic pattern to be in effect through late 2025.
Windy Run Bridge to Spout Run Parkway
Crews continue select tree removal activities ahead of rehabilitation work between Windy Run Bridge to Spout Run Parkway. Tree removal will be completed before temporary widening activities on the northbound side of the parkway begin later this year. Crews anticipate closing the right northbound lane in Spring 2024 for rehabilitation work. Current activities may require daily lane closures during the following times:
Weekday lane closures:
Saturday lane closures:
Nighttime lane closure hours (weather dependent):
All work is weather permitting.
Crews will continue with bridge work on and below the surface:
Temporary barriers remain in place at Pimmit Run, Glebe Road, Gulf Branch, Donaldson Run, Dead Run, Windy Run, and Turkey Run bridges with narrower lane widths as work continues. No additional traffic delays are anticipated at this time.
Construction Zone Safety
Please slow down and be cautious while driving through work zones on the parkway.
Inclement Weather and Potential Traffic Impacts
During the winter season, the NPS may shift the reversible lane schedule or close the parkway in the event of inclement weather forecasts. The northern section of the parkway:
The NPS will pre-treat roads, however treating the road and removing snow will take more time because snow removal crews need to use smaller equipment to fit in the narrower lanes. Drivers should expect delays in reopening the northern section of the parkway while crews clear snow and treat other sections of the parkway and park areas. Drivers should observe traffic signs, respect the 40-mph speed limit, expect delays through narrow travel lanes, and seek alternate routes. Commercial vehicles are always prohibited from using the parkway. Subscribe for email updates on parkway closures. Updates will also be posted on our website and on social media.
Potomac Heritage National Trail Partially Closed through late Spring 2024
A portion of the Potomac Heritage National Trail is closed under the Glebe Road Bridge for safety reasons. Crews installed containment platforms for blasting and painting activities under the bridge limiting space between the bridge and pedestrian trail. The partial closure of the trail is in place through the late Spring of 2024 as a safe detour is unavailable. Signage has been posted at trail entrance and exit points. Click here for more information on the trail closure.
Construction Signage on the North Parkway
Frequently Asked Questions (FAQs)
This project is the reconstruction of approximately 7.6 miles of the northern section of the GWMP between Spout Run and the I-495/Capital Beltway in Fairfax and Arlington counties, Virginia. This project will improve the driving experience, safety, and water drainage while retaining and enhancing the historic beauty and culture of the parkway.
This rehabilitation includes:
This project is the first rehabilitation in this section of parkway since it was completed in 1962. Once completed, this historic parkway will continue to provide a safe, scenic, and smooth experience for those who are using it to connect to our nation’s history or as a way to get to and from our nation's capital.
The National Park Service (NPS), in partnership with the Federal Highway Administration Eastern Federal Lands Highway Division (FHWA - EFLHD), continue the process of rehabilitating the northern section of the George Washington Memorial Parkway (GWMP).
The northern section of the GWMP, between Spout Run to I-495/Capital Beltway, is the busiest section of the parkway and serves about 26 million drivers annually. It is a four-lane divided scenic parkway that is listed on the National Register of Historic Places and serves as a major commuter route between northern Virginia and Washington, D.C., carrying roughly 70,000 vehicles per day. It also provides access to several recreational and historic sites along the roadway. The physical roadway is reaching the end of its lifespan in the northern part of the parkway. NPS wants to rehabilitate the historic parkway to provide a safe and scenic experience while extending its lifespan. This project will repair and rehabilitate deteriorating aspects of the roadway as well as implement safety improvements while preserving the cultural and historical characteristics of the parkway.
Construction activities are tentatively scheduled to begin in August 2022. The project is anticipated to be completed in late 2025.
In September 2018, the NPS achieved a major milestone project by completing an environmental review completed for the rehabilitation. The NPS completed an Environmental Assessment and analyzed public comments before deciding how best to rehabilitate the north section of the parkway.
The National Park Service's preffered alterntative for the is intersection is to consolidate Route 123 on-ramps to southbound GWMP at a new intersection east of Pine Tree Road (modified diamond interchange). Conceptual map is depicted below.
North Parkway News
Last updated: February 8, 2024