Full and partial ramp closures on I-41 in Brown County begin July 7 as part of a $6.87 million bridge preservation project expected to last into 2027.The Wisconsin Department of Transportation Northeast Region is warning motoris ts that full closures of I-41 flyover ramps at system-to-system interchanges on Green Bay's west side begin Tuesday, July 7, 2026. The closures are part of a $6.87 million contract to improve six flyover ramps on I-41 in Brown County and one flyover ramp in Winnebago County.The project involves milling a portion of the bridge decks, performing deck repairs, and overlaying the surfaces with a polyester polymer concrete overlay at the six Brown County flyover ramp locations. The Winnebago County ramp at the I-41 and US 45 system interchange will receive a polymer overlay in 2027.What drivers need to know:Two-lane ramps will generally remain open during the day with lane closures. Single-lane ramps will be fully closed and detoured. Temporary evening and overnight full closures may also occur for repair work. Lane closures may cause delays during peak travel times.I-41/WIS 29/WIS 32 interchange closures:The first closure begins Tuesday, July 7, when the I-41 southbound to WIS 29 westbound ramp closes for approximately one week. Drivers should use I-41 southbound Exit 168 C to return to WIS 29 westbound.Beginning Monday, July 13, through Saturday, Aug. 1, 2026, the I-41 northbound on-ramp from WIS 54/Mason Street will close for three weeks. The detour directs drivers to take the I-41 southbound on-ramp at Mason Street, use the I-41/Lombardi Avenue interchange at Exit 167 to make a U-turn, and re-enter northbound I-41.During the Mason Street closure, the I-41 northbound to WIS 29 westbound two-lane ramp will have single-lane closures during the day and may have temporary evening and overnight full closures.The WIS 29 eastbound to I-41 northbound ramp will also close, though dates have not yet been determined. The detour for that closure directs drivers to exit at WIS 29 eastbound to Packerland Drive/Shawano Avenue, then proceed east on Shawano Avenue to the northbound I-41 on-ramp.I-41/I-43 interchange closures:Dates for closures at the I-41/I-43 interchange have not yet been determined. Three flyover ramps at that location will remain open with single-lane closures: I-41 northbound to I-43 southbound I-43 northbound to I-41 southbound I-43 northbound to I-41/US 41 northboundShort-term evening or overnight full closures may occur at those ramps. No posted detours will be in place for overnight closures drivers should follow signage.Winnebago CountyWork on the northbound I-41 to northbound US 45 ramp in Winnebago County is scheduled for 2027 under a full closure.Project ramp locationsI-41/I-43 interchange, Brown County: Northbound I-41 to southbound I-43 (over Velp Avenue) Northbound I-43 to southbound I-41 (over I-41) Northbound I-43 to northbound I-41I-41/WIS 32/WIS 29 interchange, Brown County: Southbound I-41 to westbound WIS 29 (over WIS 29) Eastbound WIS 29 to northbound I-41 (over I-41/WIS 29) Northbound I-41 to westbound WIS 29 (over I-41)Winnebago County: Northbound I-41 to northbound US 45 (over I-41)WisDOT encourages motorists to plan ahead, allow extra travel time, and check the official project website for real-time updates, detour maps, and schedule changes.More information is available at the I-41 Flyover Ramp Project website. The project will also appear on the Northeast Region Weekly Highway Construction Update. Work zone safety information, including rules for motorists and hand-held device restrictions, is available at the WisDOT work zone safety website. ...read more read less