The Smithfield Street Bridge, which connects Downtown and the South Side, will experience lane restrictions in each direction from Monday through Friday next week.

PennDOT’s contractors from Pittsburgh-based GFT will inspect the bridge between 9 a.m. and 3 p.m. daily.

While the bridge and its ramps will remain open during the inspection, PennDOT advised commuters to drive carefully and prepare for changing traffic patterns as work progresses.

The Smithfield Street Bridge debuted in 1883 and is the oldest operating bridge in Pittsburgh.

Western Pennsylvanians should also keep the following upcoming traffic restrictions in mind:

Pittsburgh

• The southbound ramp shoulder on I-579 to the Boulevard of the Allies will close from 6 a.m. until noon on Saturday. Crews are inspecting the ramp. The ramp itself will remain open to traffic.

Allegheny County

• Penn Hills: Hunter Road will close between Highview Drive and Springwood Drive around-the-clock beginning Tuesday and through late August. Workers are completing slide repairs. Commuters can follow a posted detour via Allegheny River Boulevard, Sandy Creek Road, Verona Road, Hulton Road and Hamil Road.

• Pittsburgh, Ross and West View: Mobile single-lane restrictions will take place southbound along Route 19 between Rochester Road and Waldorf Street beginning Monday and from 9 a.m. to 3 p.m. on weekdays through mid-October. Crews are removing old cables from utility holes.

• Marshall and Franklin Park: Lane restrictions will be in effect on I-79 from 7 p.m. to 6 a.m. each weeknight, Monday through Friday. Southbound I-79 will be reduced to a single lane of traffic between the off- and on-ramps at the Route 910/Wexford (Exit 73) interchange on Monday and Tuesday. I-79 will be reduced to a single lane in both directions at the off- and on-ramps at the Route 910/Wexford (Exit 73) interchange on Wednesday through Friday. Contractors are completing abutment work related to the $46.5 million I-79/Route 910 Wexford Interchange project.

• Marshall: Single-lane restrictions will take place in both directions of I-79 between the Warrendale interchange (Exit 75) and the Youngstown/Harrisburg/I-76 interchange (Exit 77) northbound on Monday from 9 a.m. to 3 p.m. and southbound on Tuesday from 9 a.m. to 3 p.m. Crews are inspecting nearby bridges.

Greene County

• Washington: The northbound ramp at Interstate 79’s Exit 19 (Ruff Creek/Jefferson) will close on Monday from 7 a.m. to 5 p.m. Crews are performing concrete patching and asphalt work. Commuters can follow a posted detour via Exit 23 (Marianna/Prosperity).

• Washington: Single-lane restrictions on I-79 between Exit 14 (Masontown/Waynesburg) and Exit 23 (Marianna/Prosperity) that began in June will now continue until late August.

Westmoreland County

• Rostraver: Single-lane restrictions will take place in both directions of Route 51 between McKenery Drive and Porter Drive beginning Monday and from 6 a.m. to 4 p.m. until mid-September. Crews are milling and paving as part of PennDOT’s $120.6 million effort to install a Diverging Diamond Interchange.