I-95/I-295/I-495 Interchange- Woodrow Wilson Bridge
Location: Prince George's County, Maryland
Client: Maryland State Highway Administration
Looking west at Woodrow Wilson Bridge
The JMT Team applied creativity and innovation for the design of
this complex major highway interchange project, which included the
reconstruction of I-95/I-495 to accommodate six highway lanes in
each direction in an express/local configuration from the Woodrow
Wilson Bridge to west of MD 210.
JMT, as the lead of a Joint Venture Team, was responsible for
providing engineering services for the design of a new $250-million
interstate interchange in conjunction with the Woodrow Wilson
Memorial Bridge replacement project. The Task Order type design
contract had 26 distinct tasks. This project adjoins the $1 billion
Woodrow Wilson Bridge to the west, the $1+billion development of
National Harbor to the south, the I-95/MD 210 Interchange to the
east, and the D.C. widening of I-295 to the north. Special
attention was given to the environmental and aesthetic aspects of
the highway and structure designs because of the location along the
Potomac River and its proximity to the nation's capital.
The project included the freeway widening and reconstruction of
I-95/I-495 to accommodate six highway lanes in each direction in an
Express/Local configuration from the Woodrow Wilson Bridge to west
of MD 210. I-295 from MD 210 to the D.C. line was widened and
reconstructed into a six-lane divided highway. This project was
unique due to the complexity of the design and the considerations
required for the development of plans for Maintenance of Traffic
(MOT) and construction phasing to maintain an Average Daily Traffic
(ADT) of nearly 200,000 vehicles per day as well as coordinating
MOT between adjoining major projects. The mainline of the Capital
Beltway had to be raised nearly 40 feet at the approach to the new
Woodrow Wilson Bridge, while maintaining traffic.
The design included highway and major bridge ramps, secondary
roads, access ramps, HOV lanes, and ingress and egress ramps for
HOV Lanes and Express Lanes. Three continuous multi-span curve
girder bridges over 1,200 feet long were designed , two of which
utilized steel integral pier caps due to limited space for piers
between roadways. An advanced contract was advertised to
pre-consolidated areas with very poor soils and expected
settlements up to four feet. Two-stage MSE retaining walls were
used to allow for large settlements without failure. This is the
first application of this type wall in Maryland. In addition,
temporary retaining walls were designed to allow for phasing of MOT
while changing the profile between adjacent lanes of traffic by as
much as 25 feet.
Project Details:
- $250M construction cost
- 12 local/express lanes
- 26 bridges (8 mainline bridges and 19 ramp Bridges)
- 3 pedestrian trail bridges
- 31 retaining walls
- Environmental & ROW concerns
- 2020 ADT = 295,000
Additional services included: Surveying, right-of-way plats,
traffic engineering, complex MOT, signing and lighting,
geotechnical investigations, value engineering, environmental
permits, hydrology/hydraulics, stormwater management, erosion and
sediment control, on-site engineering support, landscape
architecture, utility relocation and post award services.
« Go Back