All motor vehicles shall be driven upon the right half of any approach or driveway on public grounds, except as follows:
(a) Unless otherwise directed by a police officer;
(b) Unless the right half of the driveway is closed to traffic;
(c) Unless such approach or driveway is sign posted for one-way traffic;
(d) Unless it is for single-lane traffic in both directions.
(Ord. 124-1957. Passed 5-6-57.)