Whenever the director of transportation determines on the basis of an engineering and traffic investigation that stop signs are necessary to stop traffic on a through highway for safe and efficient operation, nothing in this section shall be construed to prevent such installations. When circumstances warrant, the director also may omit stop signs on roadways intersecting through highways under his jurisdiction. Before the director either installs or removes a stop sign under this division, he shall give notice, in writing, of that proposed action to the affected local authority at least thirty days before installing or removing the stop sign.
R.C. §4511.65