MASON CITY, Iowa — Construction on Interstate 35 near Clear Lake is moving into its final phase, the Iowa Department of Transportation’s Mason City construction office announced.

Starting September 2, the entrance ramp to southbound I-35 at U.S. 18 (Exit 194) will be closed. A detour will be provided for those needing access to southbound I-35 from U.S. 18.

The closure and detour are expected to last until late October or early November.

The Iowa DOT urges drivers to use the marked detour, drive cautiously, and adhere to posted speed limits and signs. Traffic fines are doubled in work zones, and drivers are reminded to stay alert, maintain safe distances, and wear seat belts.

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