 At Erma Ave., the route intersects Spur 203 and the route turns south to O'Reilly St. where FM 170 separates from Bus.US 67-A.FM 170 then follows a winding path west along O'Reilly St., then south along Hurd Ave. where it crosses the South Orient Rail Line, then west along Millington Blvd., then south along Fourth St. before leaving the city's street grid to the southwest.