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Motorists on Interstate 90 in Austin will be detoured each night from Monday through Thursday from 8 p.m. to 6 a.m., while construction crews place deck work over the highway at Fourth Street Northwest, according to the Minnesota Department of Transportation.

The deck work for the Austin I-90 bridges project prepares the bridge for crews to pour the concrete bridge deck next month.

This is the second year of a three-year $50 million construction project at six sites in Austin. The new bridge will open to traffic at Fourth Street Northwest by late fall. Other bridge construction is planned for 2026.

During the daily overnight closures, motorists will be detoured from 8 p.m. to 6 a.m.:

• Eastbound I-90 traffic will be slowed to travel up and down the off- and on-ramps at Fourth Street Northwest.
• Westbound I-90 traffic will be detoured off I-90 at Highway 218 south (Exit 180 B) on the east side of Austin. Travel south on Highway 218 to Mower County Road 28 west to Highway 105 north where it will reconnect with I-90 on the west side of Austin at the Highway 105/Oakland Avenue bridge. Westbound traffic will be able reach Austin destinations by using exits at:
  • Oakland Place Northeast (Exit 180 A)
  • 11th Drive Northeast (Exit 179)
  • Sixth Street Northeast (178B) – No traffic will be allowed past this exit during the nightly closures.

Construction timetable at six sites from 2024-26:

• Oakland Avenue West (Highway 105), replaced in 2024. Bridge opened to traffic on Oct. 18.
• I-90 over Sixth Street Northeast, rehabilitation. Eastbound completed in 2024. Westbound work is taking place in 2025.
• I-90 over Cedar River, replacements. Eastbound done in 2024. Westbound work is taking place in 2025.
• Fourth Street Northwest, replace in 2024-2025, detours started in May.
• 14th Street Northwest (Highway 218 north), replace in 2026.
• 21st Street Northeast (Highway 218 south), replace in 2026.