Crashes on I-75 in northern Genesee County that began late Monday morning caused a closure of I-75 between Mt. Morris and Birch Run. Several inches of snow brought slippery driving conditions and poor visibility. A Genesee County Sheriff’s patrol unit was involved in a crash with a semi. The semi lost its load of coiled aluminum extending the time needed to clear the freeway. Southbound traffic was being diverted from I-75 at the Birch Run exit causing heavy traffic on Dixie Highway. Snow is expected to continue into Monday evening.