About the Program

River Crossing Visualizations 

The IBR Program recently held a series of architectural elements workshops with advisory group members to gather feedback on a program-wide vision for architecture and aesthetics. The design team shared preliminary concepts, themes, and visual examples — not final designs meant for construction — to help participants and the community imagine how a future bridge could be both functional and visually appealing. While the sample set of images shown reflect a single-level, fixed-span bridge for illustration, both fixed and movable span options are being studied, with a final decision on configuration expected in early 2026. The Program’s design team provided two presentations to the Joint Advisory Group on July 21 and Aug. 27.

Bird’s Eye View of I-5 Interchanges in Program Area

NB I-5 – Single-level, Fixed-span Steel Girder Bridges, 1 Auxiliary Lane and C St Ramps

SB I-5 – Single-level, Fixed-span Extradosed Bridges, 1 Auxiliary Lane and C St Ramps

SB I-5 – Single-level bridges, labeling bus on shoulder on the inside lanes, shared use path on the outside left and light rail transit on the outside right

SB I-5 – Single-level bridges annotated to demonstrate auxiliary lane, bus on shoulder, shared use path and light rail transit. 

NB I-5 – Single-level, Fixed-span Extradosed Bridges, 1 Auxiliary Lane and No C St Ramps

SB I-5 – Single-level, Fixed-span Steel Girder Bridges, 1 Auxiliary Lane and No C St Ramps

NB I-5 – Single-level bridges, labeling bus on shoulder on the inside lanes, shared use path on the outside right and light rail transit on the outside left

NB I-5 – Single-level bridges annotated to demonstrate auxiliary lane, bus on shoulder, shared use path and light rail transit. 

NB I-5 – Double-deck, Fixed-span Truss Bridges, 2 Auxiliary Lanes and C St Ramps

SB I-5 – Double-deck, Fixed-span Truss Bridges, 2 Auxiliary Lanes and C St Ramps

The videos above show program investments and design options being studied.  


New River Crossing Visualizations - Viewpoints

New images were developed to help the community visualize a replacement bridge and nearby elements. The images show each of the bridge configurations (single-level, double-level, and movable-span) being analyzed in the Supplemental Environmental Impact Statement (SEIS) from different viewpoints close to the proposed structure or while traveling on the shared use paths* in these areas. The images include one example bridge type for each of the bridge configurations: extradosed bridge for single-level, truss bridge for double-level, and girder bridge for a movable-span. They do not represent a complete range of bridge types being considered. No decision has been made on the bridge type or configuration at this time.

*Shared use paths: Active transportation facilities and pathways for non-motorized travel including walking, biking, and rolling.


River Crossing Visualizations - Bridge Types

The images below were created to help visualize what a proposed replacement bridge could look like. The visualizations show five different bridge types based upon the three configurations currently being analyzed in the environmental review process (single-level fixed-span, double-level fixed-span, and single-level movable-span bridge configurations). 

 

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