Below is a summary of the major closings and restrictions this weekend:

I-79 Single lane traffic on I-79 in both directions in the area between the Cranberry and Wexford interchanges will occur from 7 p.m. Friday through approximately 5 p.m. Saturday. Crews will be milling, paving and line painting. Restrictions will occur Significant delays should be expected. Motorists should consider alternate routes. Southbound restrictions will begin first on Friday evening.

Single lane traffic on I-79 in both directions from Washington County to ½ mile north of the Bridgeville interchange will occur from 7 p.m. Friday through 7 p.m. Saturday. Crews will be sawing and sealing roadway joints.

Parkway East The outbound (eastbound) Parkway East (I-376) will be reduced to single lane in Monroeville from 8 p.m. Friday to 6 a.m. Monday. The outbound off-ramp to Plum/northbound Route 48 will also be closed. Crews will be paving the ramp and the outbound Parkway East between the Monroeville off-ramp and the Pennsylvania Turnpike. Signs will be posted to guide motorists during the Plum outbound off-ramp closures.

Parkway North/Fort Duquesne Bridge A single, right lane closure on outbound (northbound) Fort Duquesne Bridge approaching the Parkway North (I-279) will occur from 4 a.m. to 8 p.m. Saturday. Brief traffic stoppages of 15 minutes or less in both directions on the bridge will also occur as needed. Crews will be resetting bearings.

Route 50 Work to improve Route 50 (Washington Road/Pike) and Greentree Road in Collier and Scott townships and Heidelberg and Carnegie boroughs will continue this weekend. The following restrictions will occur from 8 p.m. Friday to 6 a.m. Monday: • Crews will be milling and resurfacing the deck on the bridge that carries Greentree Road over Chartiers Creek. Traffic will be reduced to a single lane in each direction shifted around the work area. • Route 50 will be reduced to a single lane in each direction in the area of the Thoms Run Road intersection. Crews will be milling and resurfacing the deck on the bridge over Chartiers Creek. The following restrictions will occur from 8 p.m. Friday to 7a.m. Monday: • Single lane traffic will occur on Route 50 in both directions for paving between Collier Avenue in Heidelberg and Boden Avenue in Carnegie. Crews will apply the final paving surface.