331.06  DRIVING UPON LEFT SIDE OF ROADWAY.
   (a)   No vehicle shall be driven upon the left side of the roadway under the following conditions:
      (1)   When approaching the crest of a grade or upon a curve in the highway, where the operator's view is obstructed within such a distance as to create a hazard in the event traffic might approach from the opposite direction;
      (2)   When the view is obstructed upon approaching within 100 feet of any bridge, viaduct, or tunnel; or
      (3)   When approaching within 100 feet of or traversing any intersection or railroad grade crossing.
   (b)   This section does not apply to vehicles upon a one-way roadway, upon a roadway where traffic is lawfully directed to be driven to the left side, or under the conditions described in Ohio R.C. 4511.25(A)(2) or a substantially equivalent municipal ordinance.
(ORC 4511.30)
Penalty - see Sections 307.01 and 307.02