Route 1 Design-Build at Ft. Belvoir
AMT is the Engineer of Record for the $69 million design-build project in northern Virginia, which provides traffic relief and safety enhancements along 3.68 miles of Route 1 at Fort Belvoir.
These improvements widen Route 1 from four to six lanes, improve intersection operations and capacity with new traffic signals and turn lanes, reserve a 32-foot-wide median for future transit, and provide parallel sidewalks and bicycle facilities along the entire corridor.
AMT is the Engineer of Record for the $69 million design-build project in northern Virginia, which provides traffic relief and safety enhancements along 3.68 miles of Route 1 at Fort Belvoir. These improvements widen Route 1 from four to six lanes, improve intersection operations and capacity with new traffic signals and turn lanes, reserve a 32-foot-wide median for future transit, and provide parallel sidewalks and bicycle facilities along the entire corridor.
The team divided the design plans into phases, both geographically and by discipline, to meet the contractor’s construction schedule. Submitting plans in multiple phases allowed the contractor to break ground on multiple sections of the project concurrently, install erosion and sediment controls and facilitate utility relocations.
Due to the heavy traffic through the project area, four lanes of traffic and turn lanes on Route 1 are kept open at all times. Its proximity to Interstate 95 and its importance as a regional corridor prevent detours and road closures to complete these improvements. The project addresses these challenges using temporary alignments and temporary span wires at signalized intersections. This solution provides flexibility to shift traffic patterns to accommodate construction while maintaining the required roadway capacity.
There are large areas of undisturbed land on either side of Route 1, which contain wildlife, and multiple stream crossings. The roadway’s design maintains stream flow and provides areas for wildlife to safely cross Route 1. Extensive landscaping design also minimizes the footprint and impacts of proposed noise walls. These accommodations were a significant design consideration.
The project also runs through two historic districts and is adjacent to residential neighborhoods. The final design and construction have been closely reviewed and coordinated with each of the neighboring stakeholders. The design of the roadway realignment removed a large disused railroad bridge and its abutments. The project team is creating a conceptual design for a replacement bridge that may be part of a future light rail route. Because of the roadway realignment, two historic structures are being relocated: a public stables and the Otis Mason House.
AMT is currently providing construction quality control and testing on the project
- Roadway widening,
- Realignment of Route 1 in the Woodlawn Historic District,
- New bridges over Accotink Creek to resolve frequent flooding,
- MSE retaining walls,
- Noise barriers, closed and open drainage,
- Stormwater management quality and quantity control facilities,
- Erosion and sediment control
- New culvert crossings
- Pavement markings,
- Signal design,
- A three-phase maintenance of traffic plan
- Utility relocations
- Designed reforestation for tree replacement based on Fort Policy
- FEMA floodplain model update
Looking south toward Fairfax County Parkway.
The project is required to keep at least one lane of traffic moving in each direction on this busy section of roadway.