I-90 and SR 18 Diverging Diamond Interchange and Widening Project
Sector: Road • Location: Seattle, Washington, United States
Source: My Northwest
The project involves the construction of a new diverging diamond interchange at I-90 and SR 18, along with two miles of widening to the south. The interchange was opened last summer, and the widening finished a few months later. The current work focuses on final paving and striping, which require warmer and drier weather conditions. Several extended weekend closures are planned to complete the fin
- Status
- Under Construction
- Sector
- Road
- Location
- Seattle, Washington, United States of America
- Updated
- 22 Jul 2026
- Source
- My Northwest
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Project Information
Participants
| Not available for this record. |
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 the construction of a new diverging diamond interchange at I-90 and SR 18, along with two miles of widening to the south. The interchange was opened last summer, and the widening finished a few months later. The current work focuses on final paving and striping, which require warmer and drier weather conditions. Several extended weekend closures are planned to complete the final driving wear surface and striping. |
Original sector | Transportation |
Location
Country | United States of America (USA) |
State | Washington |
City | Seattle |
Source
Source | My Northwest |
URL |
More Details
Record type | Project |
Sector | Road |
Article published date | 2026-04-05 |
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