Missouri Secondary State Route U runs north-south in Northeastern Phelps County. It runs from Missouri Secondary State Route KK, near St. James, north to Diestelkamp Road, southeast of Royal. MO Sec St Rt U does not pass through any towns in Phelps County. MO Sec St Rt U is not multi-plexed in Phelps County. MO Sec St Rt U crosses the following highways in Phelps County. Missouri Secondary State Route KK, near St. James.
