(1) No vehicle shall be driven on the left side of the highway under the following conditions:
(a)  When approaching or upon the crest of a grade or a curve in the highway where the driver’s view is obstructed within a distance as to create a hazard in the event another vehicle might approach from the opposite direction;
(b)  When approaching within one hundred (100) feet of or traversing any intersection or railroad grade crossing, unless otherwise indicated by traffic control devices;
(c)  When the view is obstructed upon approaching within one hundred (100) feet of any bridge, viaduct or tunnel.
(2)  The foregoing limitations shall not apply upon a one-way highway, nor under the conditions described in subsection (1)(b) of section 49-630, Idaho Code, nor to the driver of a vehicle turning left into or from an alley, private road or driveway.
(3)  A motorist may drive to the left of no passing pavement markings to complete a passing maneuver started in advance of the no-passing zone, providing the requirements of section 49-634, Idaho Code, are met.
(4)  The provisions of this section do not apply under the conditions described in section 49-630(1)(b), Idaho Code, nor to the driver of a vehicle turning into, or from a highway.