Click & "Dig" Here . . . Railroad under Ground - - Berry St Tunnel - Port Authority Busway [former PRR Cork Run] - - Dravosburg Tunnel - Union RR - - Enlow Tunnel - Montour Trail [Montour RR] - - Etna Tunnel - CSX RR [B&O RR] - - Essen Tunnel - PC&Y RR Beadling Branch - - Glenshaw Tunnel - CSX RR [B&O RR] - - Greentree Tunnel - W&LE RR [Pittsburg-Wabash Terminal RR] - - J&L / LTV South Side Works Tunnel - CSX [P&LE RR] - - Mt. Lebanon Transit Tunnels - Port Authority "T" - - Mt. Washington Transit Tunnel - Port Authority "T" and South Busway - - Neville St Tunnel - CSX [Pittsburgh Junction RR] - - North Bessemer Tunnel - Union RR [B&LE RR] - - Panhandle RR Tunnel under Grant's Hill, Pittsburgh - - Pittsburgh International Airport "People Mover" tunnel - - Port Perry Tunnel - Norfolk Southern [PRR] - - Ravensburg Tunnel - W&LE RR [West Side Belt RR] - - Wabash Tunnel - Port Authority [Pittsburg-Wabash Terminal RR] - - Whitehall Tunnel - CSX RR [B&O RR] . . . Railroad under Railroad - - Piney Fork Tunnel - PRR Peters Creek Branch under CSX RR - - Plum Creek Branch Tunnel - PRR under B&LE RR . . . Railroad under Water - - Logans Ferry Mine Tunnels under Allegheny River . . . Road under Ground - - Armstrong Tunnel - - Fort Pitt Tunnel - - Liberty Tunnel - - Squirrel Hill Tunnel - - Stowe Tunnel . . . Road under Railroad - - Brick Hollow Tunnel - Brick Hollow Rd under Union RR - - Camden Hill Tunnel - Camden Hill Rd under Union RR - - Corliss St Tunnel under Norfolk Southern [PRR] - - Curry Hollow Tunnel - Curry Hollow Rd under Union RR - - Elicker Rd Tunnel - under Unity RR - - Ghost Tunnel - Dawson Rd under B&LE RR - - Greentree Rd under W&LE RR [Pittsburg-Wabash Terminal RR] - - Lafever Hill Rd under B&LE RR - - Leak Run Tunnel - Old Wm Penn Hwy under Union RR - - Little Deer Creek Rd under B&LE RR at Rural Ridge - - Piney Fork Rd Tunnel - under CSX RR [B&O RR] - - Rich Hill Rd under B&LE RR Indianola spur - - Shousetown Tunnel - Main St under CSX RR [P&LE RR] . . . Road under Road - - Dixon Av under Lincoln Hwy . . . Pedestrians - - East Pittsburgh ped subways - - Herron Av pedestrian subway under Bigelow Blvd - - Pittsburgh ped subways, downtown - - (U/C) Overbrook School pedestrian subway under Saw Mill Run Blvd - - PRR pedestrian subways, Wilkinsburg & Edgewood - - Reservoir Rd Tunnel Walk, Highland Park - - Sewickley train station ped subway . . . Water under Railroad - - Plum Creek under B&LE RR . . . Water under Ground - - Pennsylvania Canal Tunnel under Grant's Hill, Pittsburgh