In 1949 , US 64 was placed on new bypass north of Siler City ; its old alignment becoming US 64A .
In Plymouth , US 64 was placed on new bypass south of the downtown area .
In 1949 , US 64 was placed on new bypass north of Siler City ; US 's old alignment US US 64A .
In Plymouth , US 64 was placed on new bypass south of the downtown area .