Second Downtown Seattle Light Rail Tunnel
Sector: Tunnel • Location: Seattle, Washington, United States
Source: The Urbanist
Sound Transit is reconsidering the plan to build a second downtown Seattle light rail tunnel. Instead, the agency is studying the feasibility of operating three light rail lines in the existing tunnel using new technology and system upgrades, which could increase train frequency and capacity. The study will analyze tradeoffs including cost, operational challenges, and construction impacts, to info
- Status
- Prospective
- Sector
- Tunnel, Rail, Government
- Location
- Seattle, Washington, United States of America
- Updated
- 22 Jul 2026
- Source
- The Urbanist
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Project Information
Participants
Sponsoring Agency |
Status
Original status | planned |
Taiyo status | Prospective |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | Sound Transit is reconsidering the plan to build a second downtown Seattle light rail tunnel. Instead, the agency is studying the feasibility of operating three light rail lines in the existing tunnel using new technology and system upgrades, which could increase train frequency and capacity. The study will analyze tradeoffs including cost, operational challenges, and construction impacts, to inform the board's decision on whether to build the second tunnel and when to sequence it in the project timeline. |
Original sector | Transportation |
Budget |
Location
Country | United States of America (USA) |
State | Washington |
City | Seattle |
Source
Source | The Urbanist |
URL |
More Details
Record type | Project |
Sector | Tunnel, Rail, Government |
Article published date | 2025-11-01 |
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