(NILES) Traffic on Route 21 in the northern suburbs will be reduced to one lane throughout the summer for a resurfacing project.

Route 21 will be reduced to one lane in each direction during the daytime hours between Touhy Avenue and Glenview Road, impacting drivers in Niles and Glenview, according to the Illinois Department of Transportation.

Crews will be working on a resurfacing project, IDOT said.

Construction began Monday and will be complete by the end of August, IDOT said. Motorists can expect delays and should allow extra travel time.

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