Allegheny Mountain Tunnel Bypass
Sector: Tunnel • Location: Pennsylvania, United States
Source: Pittsburgh Post-Gazette
The Pennsylvania Turnpike is working on a preliminary design to build a new section of the toll road around the Allegheny Mountain Tunnel in Somerset County. The project aims to address high maintenance costs, sharp curves causing high accident rates, and traffic backups by creating a safer and more efficient route. The new highway section would require cutting a 250-foot-deep gorge into the mount
- Status
- Prospective
- Sector
- Tunnel
- Location
- Pennsylvania, United States of America
- Updated
- 22 Jul 2026
- Source
- Pittsburgh Post-Gazette
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Project Information
Participants
| Not available for this record. |
Status
Original status | planned |
Taiyo status | Prospective |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | The Pennsylvania Turnpike is working on a preliminary design to build a new section of the toll road around the Allegheny Mountain Tunnel in Somerset County. The project aims to address high maintenance costs, sharp curves causing high accident rates, and traffic backups by creating a safer and more efficient route. The new highway section would require cutting a 250-foot-deep gorge into the mountain and is expected to cost over $300 million. Preliminary design work will continue through 2029, followed by about three years of final design work. |
Original sector | Transportation |
Budget |
Location
Country | United States of America (USA) |
State | Pennsylvania |
Source
Source | Pittsburgh Post-Gazette |
URL |
More Details
Record type | Project |
Sector | Tunnel |
Article published date | 2026-05-07 |
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