Road improvements, including traffic signal replacement work at two intersections, are scheduled to get underway this year in the south suburbs, according to Cook County.

Rolling out its schedule of work for this year, the county said that the replacement of two bridges in the south suburbs will begin this summer.

New traffic signals are scheduled to be installed at Ridgeland Avenue and 143rd Street in Midlothian and Oak Forest, at Kedzie Avenue and 139th Street in Robbins, and at Kedzie and 175th Street in Hazel Crest, according to the schedule.

Along with new signals, work will include new street lighting, sidewalks and ramps that are compliant with the Americans with Disabilities Act and illuminated street name signs, according to the county.

Work at the three intersections is scheduled to be completed this fall, according to the timetable.

Bridges over Tinley Creek in Bremen Township and over Thorn Creek in South Holland are in line for replacement, with work starting sometime this summer, according to the county.

On 143rd Street, just east of Ridgeland Avenue, the bridge replacement will be done in three stages, including replacing the superstructure, roadway and landscaping. In South Holland, the bridge on 170th Street over Thorn Creek is being replaced, also in stages, and both bridge projects are scheduled to be finished by fall 2026, according to the county.

The county said it will continue work this year on a large road project in Tinley Park.

Work includes rebuilding and widening of 175th Street from Oak Park Avenue to just east of Ridgeland Avenue, and from Ridgeland from just south of 175th to north of Oak Forest Avenue and the intersection of Ridgeland and Oak Forest, including a stretch to the east on Oak Forest Avenue.Along with the streets, new storm and sanitary sewers are being installed, along with new sidewalks and a multi-use path.

New storm sewers along 175th are meant to eliminate roadside ditches and ponding of water on the street and sidewalks, according to the village.

Work will include installation of new traffic signals at 175th and Oak Park Avenue.

The rebuilding program started last year and is expected to be completed this fall, according to the county.

Of the expected cost of $10.3 million, the county is contributing $7.5 million and the balance is being paid by Tinley Park.

Now maintained by Cook County, Tinley Park will take over jurisdiction of the streets and responsibility for future maintenance once the project is completed.