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Example of one type of
noise-absorptive ceiling treatment, provided by Sound Seal.
This graphic demonstrates how multiple types of highway noise reach communities near the bridge.
View larger image.
This conceptual rendering shows the ceiling panel configuration on the outer edge of one side of the bridge. The actual test section will include panels on the outer edges of both sides of the bridge.
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November 2009
- View a brief narrated program on the Ship Canal Noise Wall on YouTube or on your desktop with the Windows Media Player.
- Interested in learning more? Please contact us if you would like to schedule a briefing for your neighborhood or business group.
Why is WSDOT
studying noise in this area?
Highway traffic noise can interfere with sleep, work and other daily activities during the day and night, and is a concern for many residents living along state highways. Traffic noise from the I-5 Ship Canal Bridge is a problem for residents and businesses near the bridge. Located in a heavily traveled urban area, traffic noise from the bridge reaches the densely populated Seattle neighborhoods of Eastlake, Roanoke Park, University District and Wallingford. Due to the large number of affected residents, high noise levels, and the close proximity of communities to the highway, we identified the area near the I-5 Ship Canal Bridge as a priority for reducing traffic noise.
The End Result
Reducing noise from multiple sources is a unique challenge, and this is the first time the state has pursued noise reduction on a double-deck bridge structure. We have been evaluating new and innovative noise-reducing technologies and have been consulting with national acoustics experts to determine the best approach for reducing noise. Based on expert recommendations and available funding, we are moving forward to install a test section of noise-absorptive treatment on the outer edges of the ceiling above the I-5 express lanes on the south concrete approach. We plan to begin installation in 2010.
Project Benefits
Installing a noise-absorptive ceiling treatment is a new and innovative method for state transportation agencies working to reduce highway traffic noise. We will monitor noise levels before and after installing the test section to measure the noise-reducing capabilities of the ceiling panels. We will also monitor the wear and tear of the treatment over time and evaluate its maintenance requirements and qualities. This monitoring will help us understand how the noise-absorptive material works and determine if it should be used in future projects.
What is the project timeline?
- 2006 – 2007: Examined feasibility of noise-reducing technologies identified in 2004 and continued research and analysis.
- 2008: Convened panel of national acoustics experts to evaluate and recommend feasible solutions.
- 2009: Design a test section of a noise reduction technology on the bridge, and advertise construction contract.
- 2010 – 2011: Procure materials, install and monitor the test section.
Financial Information
This project is funded through the following fund sources:
Total funding available from all sources: $7 million
How can I get more information?
Contact:
Email: NWNoiseWalls@wsdot.wa.gov
Erin Fletcher
WSDOT Project Engineer
206-770-3504
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