Missouri Secondary State Route AT is a short connector route between Missouri State Route 100 and U.S. Rt. 50 near Villa Ridge, in Franklin County. This is also signed as being a portion of Historical Route 66. MO Sec Rt AT passes through the following town in Franklin County. Villa Ridge MO Sec AT is not multi-plexed in Franklin County. MO Sec AT intersects the following highways in Franklin County. Missouri State Route 100, near Villa Ridge. U.S. Rt. 50, east of Union.
