I. No vehicle shall at any time be driven to the left side of the roadway under the following conditions:
(a) 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;
(b) When approaching within 100 feet of or traversing any intersection or railroad grade crossing, unless otherwise indicated;
(c) When the view is obstructed upon approaching within 100 feet of any bridge, viaduct or tunnel.
II. The foregoing limitations shall not apply upon a one-way roadway.