Pittsburgh's Fort Pitt Tunnel takes carpoolers to this river, not the Allegheny or the Ohio
... the 
airport and western suburbs, coming across the Fort Pitt Bridge (take the middle 
lane to ... From the southeast, Liberty Ave (which enters the Liberty Tunnel and 
then... [DOC] [TLE] chapter 4 - Allegheny Places [PAR] According to Bridges and Tunnels of Allegheny County ... effort between the 
County, PennDOT, the City of Pittsburgh and the Port Authority of .... Fort Pitt 
Tunnels.