§ 1125. Further limitations on driving to left of center of roadway. (a) No vehicle shall at any time be driven to 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 driver's view is obstructed within such distance as to create a hazard in the event another vehicle might approach from the opposite direction; 2. When approaching within one hundred feet of or traversing any railroad grade crossing; 3. When the view is obstructed upon approaching within one hundred feet of any bridge, viaduct, or tunnel.

(b) The foregoing limitations shall not apply upon a one-way roadway nor to a vehicle in any lane which is at the time allocated exclusively to traffic moving in the direction the vehicle is proceeding and is marked to give notice of such allocation.