US 75: from after Norman County Road 51 to before Norman County Road 48 road closed, bridge construction, gross weight limit in effect -- detour in operation, follow the detour signs — until September 30 Comment: This project is one half mile south of Shelly on US 75. Legal weight on detour route. Detour as follows: Northbound 75 traffic at the Jct. of US 75 and Hwy 200 will go east for 14 miles on Hwy 200 to the jct. of Hwy 9, then north on Hwy 9 for 16 miles to the jct. of Polk county 1, go west for 13 miles on county 1 to the jct. of US 75. Southbound traffic will do the reverse.