Photo from IDOT website

Motorists heading south on Interstate 55 will run into some delays starting next week.

The Illinois Department of Transportation announced that replacement of the bridge decks and other improvements to I-55 over the BNSF Railroad and Grant Creek, south of Arsenal Road in Will County will begin Monday, June 17.

To complete the project, IDOT officials say northbound I-55 initially will be reduced to a single lane to accommodate widening of the shoulders.

After the shoulders are widened, the southbound bridge will be closed and I-55 reduced to one lane in each direction on the northbound lanes.

This revised traffic configuration is expected to be in place from August until late November, when I-55 returns to two lanes in each direction.

IDOT officials also say work will resume next spring with the closure of the northbound bridge with traffic crossing over to the southbound lanes to again accommodate one lane in each direction.

No detour around the roadwork is provided, but Interstate 80 and Illinois Route 47 is the recommended alternate route.

Digital message boards will also be in place to display real-time traffic information.

The entire project is expected to be complete by the fall of 2020.