331.02  PASSING TO RIGHT WHEN PROCEEDING IN OPPOSITE DIRECTIONS.
   Operators of vehicles proceeding in opposite directions shall pass each other to the right, and upon roadways having width for not more than one line of traffic in each direction, each operator shall give to the other one-half of the main traveled portion of the roadway or as nearly one-half as is reasonably possible.
(ORC 4511.26)
Penalty - see Sections 307.01 and 307.02