Missouri Secondary State Route A is a north-south highway in Southeastern Scotland County. It runs from U.S. Rt. 136/Missouri Secondary State Route H, near Arbela, to Missouri Secondary State Route M/Y, near Rutledge. MO Sec St Rt A passes through the following town in Scotland County. South Gorin MO Sec St Rt A intersects the following highways in Scotland County. U.S. Rt. 136, near Arbela. Missouri Secondary State Route H, near Arbela.