UPDATE (WKOW) -- The westbound lanes of US-12 are now open after a 12 vehicle crash early Thursday morning.
The Dane County Sheriff's Office says emergency repairs were made to a large hole in the pavement by Dane County Highway workers.
The road buckle impacted the morning commute from 5:45 a.m. to 7:10 a.m.
Multiple agencies responded to the crash including: Madison and Monona Fire and EMS, with assistance from law enforcement partners from the City of Monona Police, City of Madison Police, Town of Madison Police, the Wisconsin Sate Patrol, the Freeway Safety Team, and the WI DOT State Traffic Operations Center.