The massive construction project near Smiths Ferry on Highway 55 is about to begin its summer schedule.

And that will impact drivers heading up to McCall, or returning to the Treasure Valley during the week.

The Idaho Transportation Department says beginning on Tuesday, the highway will be reduced to one lane of alternating traffic Monday through noon on Fridays. The weekends will be fully open to make room for travelers.

This schedule will be in place through early September.

ITD is working to widen the shoulders, minimize roadway curves and install guardrail sections.