SR 99 Tunnel Traction Improvement Project
Sector: Road • Location: Seattle, Washington, United States
Source: MLTnews
The project involves texturizing lanes in the State Route 99 tunnels under downtown Seattle to improve vehicle traction. The driving surface of the two-mile, double-decker tunnel has become worn since its opening in February 2019. The $1.5 million project will restore the tire grip using a shot-blasting technique that changes the roadway's coarseness. The work requires nightly closures of the nort
- Status
- Under Construction
- Sector
- Road, Tunnel, Government
- Location
- Seattle, Washington, United States of America
- Updated
- 22 Jul 2026
- Source
- MLTnews
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Project Information
Participants
Sponsoring Agency |
Status
Original status | under construction |
Taiyo status | Under Construction |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | The project involves texturizing lanes in the State Route 99 tunnels under downtown Seattle to improve vehicle traction. The driving surface of the two-mile, double-decker tunnel has become worn since its opening in February 2019. The $1.5 million project will restore the tire grip using a shot-blasting technique that changes the roadway's coarseness. The work requires nightly closures of the northbound and southbound tunnels and is expected to be completed before Labor Day weekend. |
Original sector | Transportation |
Budget |
Location
Country | United States of America (USA) |
State | Washington |
City | Seattle |
Source
Source | MLTnews |
URL |
More Details
Record type | Project |
Sector | Road, Tunnel, Government |
Article published date | 2025-09-16 |
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