In summer 2006, WSDOT convened a workshop with technical experts to investigate noise-reducing elements included in the 2004 study and develop a proposal for using approved funding. At this workshop, the group identified three goals for this project:
- Address the highest noise levels for maximum benefit and noticeably decrease noise in all areas.
- Maintain the bridge’s aesthetic value and historical character without harming the environment.
- Meet legislative intent and stakeholder expectations.
After reviewing the feasibility of each element, technical experts proposed using three types of noise-reducing elements:
- Noise-absorbing ceiling treatment above the I-5 express lanes.
- Street-level noise walls near the bridge.
- Rehabilitating the pavement to make it smoother and quieter.
WSDOT plans to use the $5 million allocated from the Transportation Partnership Account to evaluate these three noise-reducing elements for potential use on the I-5 Ship Canal Bridge.