The Chief of Police is authorized, with the approval of the City Manager, to determine by resolution those portions of any highway in the city where overtaking and passing or driving on the left side of the roadway would be especially hazardous and may put appropriate signs or markings on the roadway, indicating the beginning and end of such zones, and when such signs or markings are in place and clearly visible to any ordinarily observant person, every driver of a vehicle shall obey the directions thereof.
(`87 Code, § 17-258)