Map showing past improvements to the PA 28/PA 8 interchange in Pittsburgh. Allegheny River Allegheny River EXIT EXIT Allegheny Valley Expressway (Northbound) Allegheny Valley Expressway (Northbound) 8 8 Senator Robert D. Fleming/ 62nd Street Bridge Senator Robert D. Fleming/ 62nd Street Bridge 8 8 EXIT EXIT PHASE 1 Extended and rebuilt the PA 28 south ramp to PA 8 nor... PHASE 1Extended and rebuilt the PA 28 south ramp to PA 8 north.Began: 8/16/1999Concluded: 1/11/2000Cost:  $4.7 million Shaler Waterworks Shaler Waterworks Pittsburgh Zoo PPG Aquarium Pittsburgh ZooPPG Aquarium 28 28 PHASE 3 Widened and rebuilt the southbound side near Exit 6. ... PHASE 3 Widened and rebuilt the southbound side near Exit 6. The ramp from PA 8 south to PA 28 south was closed during project.Began: 4/26/2004Concluded: 3/17/2005Cost:  $26.5 million Allegheny Valley Expressway (Southbound) Allegheny Valley Expressway (Southbound) 28 28 PHASE 5 Rebuilt PA 28 northbound between Butler Street and th... PHASE 5Rebuilt PA 28 northbound between Butler Street and the 62nd Street Bridge.Began: 3/15/2010Concluded: 12/3/2010Cost:  $27.2 million PHASE 2 Rebuilt the southbound overpass to accommodate two la... PHASE 2Rebuilt the southbound overpass to accommodate two lanes.Began: 4/10/2001Concluded: 12/10/2001Cost: $11.5 million PHASE 4 Rebuilt the northbound overpass to accommodate two la... PHASE 4Rebuilt the northbound overpass to accommodate two lanes.Began: 6/7/2009Concluded: 11/25/2009Cost: $22.5 million Copyright  2010 Jeffrey J. Kitsko Pittsburgh Highways: http:... Copyright 2010 Jeffrey J. KitskoPittsburgh Highways: http://pittsburgh.pahighways.com Pittsburgh Pittsburgh Interchange Reconstruction Interchange Reconstruction Kittanning Kittanning Highland Park Highland Park Butler Butler