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Cedar Rapids, Iowa 52401
Construction to close I-380 exit ramp at Hiawatha’s Boyson Road
The DOT is turning the interchange into a ‘diverging diamond’
Jun. 13, 2025 1:42 pm, Updated: Jun. 16, 2025 9:44 am
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Drivers can expect some delays and disruption at the Interstate 380 exit and entrance ramps at Boyson Road in Hiawatha, according to the Iowa Department of Transportation’s Manchester construction office.
The northbound I-380 exit ramp will be closed starting Sunday, weather permitting, for construction work. Drivers will be directed to use the Tower Terrace exit and return on southbound I-380 to reach Boyson Road. The southbound entrance ramp to I-380 that has been closed since April will reopen on Monday evening, June 16, according to the DOT.
The Boyson Road interchange will create a “diverging diamond,“ an interchange design in which traffic switches to the left side of the roadway while crossing over the interstate. The switch allows those turning left onto the interstate a clean turn, rather than turning across oncoming traffic.
One such interchange already opened at I-380 and Tower Terrace Road, and another is planned for I-380 and Wright Brothers Boulevard.
Comments: (319) 398-8499; tom.barton@thegazette.com
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