(a) Upon any part of a grade or upon a curve in the roadway where the driver’s view is obstructed for such a distance as to create a hazard in the event another vehicle might approach from the opposite direction;
(b) When approaching an intersection or railroad grade crossing where the driver’s view is obstructed for such a distance as to create a hazard in the event another vehicle might approach from the opposite direction; or
(c) At any intersection or railroad grade crossing.
(2) This section does not prohibit a person from driving on the left side of the center of a roadway under the following circumstances:
(a) When the right half of the roadway is obstructed or closed to traffic while under construction or repair; or
(b) When a driver makes a lawful left turn.
(3) The offense described in this section, driving on the left on a curve or grade or at an intersection or rail crossing, is a Class B traffic violation. [1983 c.338 §617]