Allegheny Mountain Tunnel Bypass
Sector: Tunnel • Location: Somerset County, Pennsylvania, United States
Source: The Keystone Newsroom
A Pennsylvania Turnpike Commission proposal to reroute the cross-state highway by blasting a 1,000-foot-wide cut through Allegheny Mountain to replace the aging twin-tube Allegheny Tunnel. The project aims to address aging infrastructure, increased traffic volume, crashes, and hazardous material shipments by creating a 250-foot-deep gorge bypass with new approaches on either side. The realignment
- Status
- Prospective
- Sector
- Tunnel, Commercial, Road
- Location
- Somerset County, Pennsylvania, United States of America
- Updated
- 22 Jul 2026
- Source
- The Keystone Newsroom
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Project Information
Participants
| Not available for this record. |
Status
Original status | preliminary design stage |
Taiyo status | Prospective |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | A Pennsylvania Turnpike Commission proposal to reroute the cross-state highway by blasting a 1,000-foot-wide cut through Allegheny Mountain to replace the aging twin-tube Allegheny Tunnel. The project aims to address aging infrastructure, increased traffic volume, crashes, and hazardous material shipments by creating a 250-foot-deep gorge bypass with new approaches on either side. The realignment is considered safer and more cost-effective than building a new tunnel or adding capacity to the existing tunnel. |
Original sector | Transportation |
Budget |
Location
Country | United States of America (USA) |
State | Pennsylvania |
City | Somerset County |
Source
Source | The Keystone Newsroom |
URL |
More Details
Record type | Project |
Sector | Tunnel, Commercial, Road |
Article published date | 2026-05-09 |
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