Armstrong Tunnel Rehabilitation Project

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Project has concluded

Overview

  • Location: The Armstrong Tunnel goes through the Bluff between Forbes Avenue and Second Avenue in the City of Pittsburgh
  • Current traffic restrictions: Full closure of the inbound tunnel and the sidewalk in the outbound tunnel
  • Project start date: March 4, 2023
  • Estimated traffic restrictions end date: June 2025
  • Scope of work: Concrete repairs; removal of the ceramic tile liner and replacement with fireproof wall panels; masonry cleaning at the tunnel entrances and exits; lighting, electrical, and fire detection and suppression system upgrades; installation of a CCTV monitoring system; and placement of new pavement, curb, sidewalk, signage, and pavement markings.
  • Primary contractor: Mosites Construction Company
  • Estimated cost: $13.1 million

New Lane Configuration

After the tunnels reopen, they will have a new lane configuration to slow traffic and improve safety. Before this project began, there were two 10-foot-wide lanes with no shoulders in each tunnel and a 3-foot, 9-inch sidewalk adjacent to the outbound tunnel. After the project:

  • The inbound tunnel will have one 12-foot lane with 4‑foot shoulders except at the tunnel exit, where there will be two right-turn lanes.
  • The outbound tunnel will have one 12-foot lane with 2- to 3-foot shoulders except at the tunnel exit, where there will be a left‑turn lane and a straight/right-turn lane.
  • The sidewalk will be widened to 6 feet, 3 inches except at its entrances.

Inbound Tunnel Vehicle Detour

  • From Second Avenue, turn right onto Ross Street
  • Turn right onto Forbes Avenue

Outbound Tunnel Sidewalk Pedestrian Detour

Northbound toward Forbes Avenue

  • From Second Avenue, turn right onto Ross Street
  • Turn right onto Forbes Avenue

Southbound toward Second Avenue

  • Same as the northbound detour in the opposite direction

Overview

  • Location: The Armstrong Tunnel goes through the Bluff between Forbes Avenue and Second Avenue in the City of Pittsburgh
  • Current traffic restrictions: Full closure of the inbound tunnel and the sidewalk in the outbound tunnel
  • Project start date: March 4, 2023
  • Estimated traffic restrictions end date: June 2025
  • Scope of work: Concrete repairs; removal of the ceramic tile liner and replacement with fireproof wall panels; masonry cleaning at the tunnel entrances and exits; lighting, electrical, and fire detection and suppression system upgrades; installation of a CCTV monitoring system; and placement of new pavement, curb, sidewalk, signage, and pavement markings.
  • Primary contractor: Mosites Construction Company
  • Estimated cost: $13.1 million

New Lane Configuration

After the tunnels reopen, they will have a new lane configuration to slow traffic and improve safety. Before this project began, there were two 10-foot-wide lanes with no shoulders in each tunnel and a 3-foot, 9-inch sidewalk adjacent to the outbound tunnel. After the project:

  • The inbound tunnel will have one 12-foot lane with 4‑foot shoulders except at the tunnel exit, where there will be two right-turn lanes.
  • The outbound tunnel will have one 12-foot lane with 2- to 3-foot shoulders except at the tunnel exit, where there will be a left‑turn lane and a straight/right-turn lane.
  • The sidewalk will be widened to 6 feet, 3 inches except at its entrances.

Inbound Tunnel Vehicle Detour

  • From Second Avenue, turn right onto Ross Street
  • Turn right onto Forbes Avenue

Outbound Tunnel Sidewalk Pedestrian Detour

Northbound toward Forbes Avenue

  • From Second Avenue, turn right onto Ross Street
  • Turn right onto Forbes Avenue

Southbound toward Second Avenue

  • Same as the northbound detour in the opposite direction

Project has concluded

Please let us know if you have any questions or concerns about the Armstrong Tunnel rehabilitation project.